Our Planet In Danger Essay Topics
Today many engineers and researchers - fearful of the rate at which our planet is warming - say geo-engineering projects are now mankind's only hope of saving itself from the impact of climate change. A major report and a new exhibition at the Science Museum starting next week will resurrect the debate.
Despite 10 years of international negotiations aimed at reducing carbon dioxide levels by between 60-80 per cent, global emissions are still rising. The only hope, say geo-engineers, is to change the planet, alter its oceans and reshape its cloud cover.
It is a point highlighted by Brian Launder, professor of mechanical engineering at Manchester University, who was once 'neutral' about these great geo-engineering projects but who has come to believethat current attempts to reduce CO2 emissions are doomed to failure.
'As time has gone on I have become increasingly concerned about the lack of progress on climate change and [although] they once seemed a last resort, I have to say we're going to need to do this.'
Launder is now editing a forthcoming issue of the Philosophical Transactions of the Royal Society which will be devoted to the subject of geo-engineering schemes. 'We're moving, but I think we need to go a lot further.'
An exhibition - Can Algae Save The World? - opening at the Science Museum will also focus on hi-tech projects aimed at saving the planet.
The latest assessment report by the Intergovernmental Panel on Climate Change, published earlier this year, considered three major techniques to reduce sunlight reaching the Earth: orbiting mirrors, sulphur particle schemes and projects for enhancing cloud cover.
The ideas 'could have beneficial consequences' by increasing agricultural productivity and forestry, the panel concluded. Carbon dioxide would be left in the atmosphere, stimulating plant growth, while reductions in sunlight would stop temperatures from rising even as CO2 levels continued to increase.
'Geo-engineering is one of the types of thing that are worth investigating,' says Ken Caldeira, of the Carnegie Institution of Washington. 'If we can generate 100 ideas, and 97 are bad and we land up with three good ones, then the whole thing will have been worthwhile.'
Opponents to such schemes point out that it is technology that got mankind in its current fix. An even bigger dose of technology is therefore the last thing the planet needs. Schemes for fertilising the oceans with iron compounds pose immense risks to marine life, for example. Geo-engineers defend their schemes by pointing out that emissions of greenhouse gases are already bringing huge changes to natural ecosystems.
It is a point stressed by the distinguished ecologist James Lovelock: there are dangers in intervening but the risks posed by doing nothing are worse. 'There may be all sorts of ecological consequences,' he said. 'But then the stakes are terribly high.'
Two of Britain's leading environmental thinkers, Chris Rapley, head of the Science Museum, and James Lovelock, creator of the Gaia concept, suggest vertical pipes could pump deep cold water to the sea surface. Cold ocean water is considered to be more 'productive' than warmer water because it contains more lifeforms. And these lifeforms are vital for absorbing CO2.
Using special valves, cold water would be made to flow up floating pipes and out on to the ocean surface, bringing increased numbers of lifeforms into contact with the atmosphere and its carbon dioxide. These lifeforms would absorb CO2, die and then sink to the ocean floor, storing the carbon away for millennia.
Marine biologists point out that the scheme could pose major problems for sea life, in particular for creatures such as whales and porpoises.
Chance of success: 3/5 Impact on marine life could count against the scheme.
During major volcanic eruptions, the Earth often undergoes significant cooling. For example, when Mount Pinatubo in the Philippines erupted in 1991 the average temperature across the Earth decreased by 0.6C. Scientists pointed the finger of blame at the 10 million tonnes of sulphur that the volcano ejected into the stratosphere. So why not copy Pinatubo? That is the suggestion of Professor Paul Crutzen who won a Nobel prize in 1995 for his work on the ozone layer.
He has proposed creating a 'blanket' of sulphur that would block the Sun's rays from reaching Earth; to do this, he envisages hundreds of rockets filled with sulphur being blasted into the stratosphere. About one million tonnes of sulphur would be enough to create his cooling blanket, he says.
The idea alarms other scientists, who fear such a massive input of sulphur into the upper atmosphere could increase acid rain or damage the ozone layer. Crutzen believes his idea may still be necessary if Earth continues to warm up at its current rate. 'I am prepared to lose some bit of ozone if we can prevent major increases of temperature, say beyond two degrees or three degrees,' he says.
Chance of success: 1/5 Risks of acid rain and ozone depletion will provoke opposition.
Radiation from the Sun heats our planet and sustains life here. But as Earth warms up, scientists want to cut that radiation and one of the most ambitious ideas involves firing giant mirrors into its orbit.
Physicist Lowell Wood, at the Lawrence Livermore National Laboratory in California, has put forward the idea of using a mesh of aluminium threads, a millionth of an inch in diameter. 'It would be like a window screen made of exceedingly fine metal wire,' he explains. The screen wouldn't completely block sunlight but would filter infra-red radiation.
However, such mirrors would be expensive to make and put into orbit. To produce a 1 per cent cut in solar radiation would require mirrors with surface areas of 600,000 square miles. But once in space such mirrors would be extremely cheap to operate.
'It's very hi-tech,' said John Shepherd, professor of marine science at the National Oceanographic Centre at Southampton University. 'Who knows whether they can really do it? And it's going to cost a lot of money to find out.'
Chance of success: 1/5 Incredibly expensive.
John Latham, at the National Centre for Atmospheric Research in Colorado, and Stephen Salter, of Edinburgh University estimate that increasing cloud cover using a seawater spray 'seeding' process could increase cloud cover by 4 per cent - enough to counter a doubling of carbon dioxide in the atmosphere by shielding Earth from solar radiation.
Their plan is one of the cheaper ideas for countering rising carbon dioxide levels and is relatively low-tech, leading to hopes that, if computer simulations give good results, a field trial could start in five years.
Latham acknowledges there are dangers in changing weather patterns. 'We certainly shouldn't implement [it] in any global sense until we've done our best to examine what implications it might have,' he says.
'But if one felt that there are unlikely to be any implications that are more severe than the damage global warming is causing, then I think we'd begin.'
Chance of success: 2/5 Will need major global commitment to succeed.
Planting trees that absorb carbon dioxide has become a major eco-industry. But now scientists are proposing a surprise technological variant: synthetic trees. These trees would not grow or flower or leaf - but they would absorb carbon dioxide.
This startling concept is the brainchild of Klaus Lackner of Columbia University who first outlined his proposal at an annual meeting of the American Association for the Advancement of Science. He describes his synthetic trees as looking like 'goal posts with Venetian blinds'.
Lackner has calculated that one of his synthetic trees could remove about 90,000 tonnes of carbon dioxide in a year - the output of more than 15,000 cars and a thousandfold improvement on the natural behaviour of a real, living tree.
Lackner's concept is a variant of carbon sequestration technology which involves the seizing of carbon and storing it underground. Already schemes exist for removing carbon dioxide produced by burning coal, gas or oil at power plants before it reaches the atmosphere. Other projects are investigating ways to liquefy this carbon dioxide and store it in old mines or oilfields.
However, the process does not work for all polluters, in particular cars and lorries - hence Lackner's synthetic trees which would act like filters, removing carbon dioxide from that atmosphere. An absorbent coating, such as limewater, on slats would capture carbon dioxide so that it could be removed and then buried. However, critics say the scheme suffers from the fact that engineers could end up expending more energy in capturing carbon dioxide than they would save.
Chance of success: 4/5 Carbon sequestration is likely to play a major role in the world's battle against climate change, though perhaps not in the form of synthetic trees.
Forests of the seas
Blooms of plankton and algae are the grasslands and prairies of the oceans. They absorb carbon dioxide, die and then sink to the seabed carrying the carbon dioxide they absorbed during their lifetimes. Increase such blooms and you could take out more and more carbon dioxide from the atmosphere, scientists argue - an idea that formed the core of a recent meeting of experts at the Woods Hole Oceanographic Institution in the US.
The favoured method for stimulating plankton growth is to use iron fertilisers. It is known that tiny amounts of iron are critical in stimulating phytoplankton growth in seas. However, in many parts of the world iron in seawater is virtually non-existent and plankton levels correspondingly low.
Several groups of US entrepreneurs have begun experiments aimed at correcting this problem by pumping tonnes of soluble iron compounds into sea areas. Several trial schemes are now under way. But some critics warn that very little carbon dioxide would be removed from the atmosphere this way, while there is a danger such schemes could cause dangerous pollution.
Chance of success: 2/5 Method already in trials, but faces considerable opposition over potential damage to marine life.
Save earth is a slogan used to spread awareness among people about the importance of earth and why we should save our mother earth. Save earth slogan motivates people to save earth and its natural resources to give our future generations a safe and healthy environment.
Essay on Save Earth
Earth is our planet and a most important need for the continuity of life. It is full of all the basic resources to continue a life however; it is getting declined continuously because of some unethical behavior of the human being. Saving earth is the most important social awareness which everyone must know about to bring some positive changes on the earth. In order to spread awareness among students, teachers may assign them to write some paragraph or complete essay on save earth. Now-a-days, essay writing is one of the good strategies followed by teachers in the schools and colleges. It enhances the English writing skill and knowledge of the students about any topic. It is also an effective way to get views, ideas and positive suggestions about any topic by the students. Following are some paragraphs, short essays and long essays on save earth to help students in completing their task. All the save earth essay are written very simply. So, you can select any essay according to your need and requirement:
Save Earth Essay 1 (100 words)
As we all know that earth is the only known planet having life in this universe. So we should respect and maintain everything we get from our mother earth. We should save the mother earth so that our future generations can live in a safe environment. We can save the earth by saving trees, natural vegetation, water, natural resources, electricity, etc. We should strictly follow all the possible measures to control the environmental pollution and global warming. Everyone should plant more trees in the surrounding areas to curb the pollution and reduce the effects of global warming. Afforestation, reforestation, recycling of used paper and other natural products, saving of natural resources (minerals, coal, stones, oil, etc), electricity, water and environment should be supported and promoted.
Save Earth Essay 2 (150 words)
We do not have any other known planet beside earth in this universe where life is possible. It is the only known planet where the combination of most essential natural resources oxygen, water and gravity is found which makes the possibility of successful life here. We do not have time to think more about it and start saving earth seriously by following various effective measures in order to handover a healthy earth to our future generations. People should plant more trees to get sufficient oxygen and curb the effect of air pollution and global warming.
We should stop cutting down rain-forests to our life, atmosphere and homes of many different species. People should limit their use of electricity and use less fossil fuel to save the environment from global warming. They should promote the use of solar lights and wind energy to save destroying earth. Following the 3R rule (Reduce, Reuse, Recycle) can be proved very effective in saving our precious earth.
Save Earth Essay 3 (200 words)
Earth is the most precious thing in this universe having oxygen and water, essential things for life. The natural resources found on earth are deteriorating day by day because of various wrong practices of human beings. It keeps life on earth in danger. Various forest animals have been extinct completely because of the lack of their favorable environment.
The rate of various types of pollution, global warming and other environmental issues is increasing day by day. It is very necessary to stop all the bad practices to reduce the negative effects of same. Earth day is celebrated every year on 22nd of April to spread awareness among people all over the world. It is observed annually to appreciate people to maintain the earth’s natural environment.
Our earth takes nothing in return from us however it demands to maintain it for the continuity of health life on earth. We are not alone to live on the earth; there are various unknown living species that live on earth.
So, we should not be selfish and think about all the living species on the earth. We should save our earth and environment by reducing the amount of wastes, plastic, paper, woods, etc. we should make the habit of reuse and recycle things (clothes, toys, furniture, books, papers, etc) in order to generate less waste. We should stop all the bad practices involved in increasing the level of pollution and global warming.
Save Earth Essay 4 (250 words)
The present condition of the earth has been very challenging for the healthy existence of life because of the toxic environment, air pollution, water pollution, global warming, deforestation, and many more environmental issues. There are numerous easy ways we can save our planet however, depends on the dedication and rate of good habit followers. It should be promoted the development of environment friendly technologies so that they could not harm the planet. People should make the habit of reduction in usage of harmful things, re-usage and recycle of things in order to generate less amount of wastes.
Generally, many people use variety of house cleansers in order to keep their houses clean and disinfected. They never see the chemical constituents of that particular cleanser which can be very destructive to the water, soil and air. We should be very clear about what products we are using in daily life and always select eco-friendly cleansing products. Pollutions and global warming are generally being spread by the commercial industries to a great extent. They should follow the government rules and regulations made for controlling the same.
They should limit their harmful commercial-grade production and involve in producing environment friendly products. Awareness regarding save earth should be promoted among youths by including this topic to their study. They should be involved in the activities like planting, group discussion, essay writing, speech recitation, banner making, slogan writing competition, theme based drama play, etc in the school and college. The event named as Earth Day is celebrated annually on 22nd of April to spread awareness regarding save earth among public.
Save Earth Essay 5 (300 words)
Earth is the only known planet in this universe where life is possible as it has basic necessities of life. We need to maintain the natural quality of our mother earth in order to continue the healthy life here. Save earth save environment and save earth save life are the most famous slogans to increase awareness about save earth among people. There are various means the condition of our earth is getting declined day by day due to the pollution, greenhouse gases, etc. It is generating the harmful impact on environment and thus health of people. It is the responsibility of human beings to keep earth safe, clean and natural.
What is Earth Day
Earth Day is a global annual observance celebrated on 22nd of April since 1970 to protect the environment and save earth. The aim of this event is to inspire people for healthy earth’s environment.
How to Save our Earth
Following are some easy and effective ways of saving earth:
- We should not waste water and use only according to the requirement. We should wash dirty clothes only and in the cold water. In this way, we can save many gallons of water per day.
- People should share private cars and generally use public transport in order to reduce the emission of greenhouse gases.
- People should use bicycle to perform work in local areas.
- People should follow 3R methods means reduce, reuse and recycle things.
- People should make compost which is a great natural fertilizer for the crops.
- We should use Compact fluorescent light bulbs (CFLs) instead of common bulbs as they are more durable and use two-third less energy which will reduce the use of electricity and greenhouse gases emissions.
- We should not use electric heater or air conditioner unnecessarily without necessity.
- We should maintain our private transport and drive smartly in order to reduce pollution.
- We should switch off lights, fans and unplug other electric appliances to use less electricity.
- We should plant more trees in the surrounding areas to reduce pollution and effect of green house gases.
Earth is our mother planet which gives us all the necessary things we need for living a life. So, we are also responsible to maintain its natural quality and greenery environment. We should not waste and pollute its natural resources for our small benefits.
Save Earth Essay 6 (400 words)
Save earth and save environment both related to the safety of life on the earth. As being human being, we should strictly involve in the activities reducing pollution and global warming and save the earth.
Easy Ways to Save Earth
There are various easy ways which can be helpful in saving the earth. Earth is the only known planet of the solar system having life. In the ancient time, people were not involved in any type of destructive work, so there was no any fear of pollution and other environmental issues. After explosion in the population, people started developing cities and industries for the modern lifestyle and easy life for everyone. For industrialization man learned misusing the natural resources beyond the limit. People involved in deforestation which resulted in extinction of various wild animals, pollution, and global warming. Due to the global warming the protective ozone layer got a hole, rise in sea level, melting of ice caps of Antarctica and Greenland, etc negative changes occurred. Such types of environmental changes are alarming sign to us. Following are some ways regarding save earth:
- We should save forest through afforestation and reforestation. Plants are the most basic need of life whether human beings, animals or other living things. They give us food, oxygen, shelter, fuel, medicines, safety, and furniture. They are very necessary to maintain the natural balance between environment, climate, weather, and atmosphere.
- We should take care of the wildlife by stopping deforestation and promoting reforestation. Thousands of species and birds have been extinct because of destruction of their habitat. They are very necessary to balance the food chain in the nature.
- Our environment is being declined continuously as a result of deforestation, industrialization, urbanization, and pollution. It is threatening the lives through global warming and climate changes because of the emission of carbon dioxide and other greenhouse gases. We should save our environment to balance all the natural cycles.
- We are needed to bring huge level changes in our unnatural lifestyle as much as possible to save the earth.
- There is need to transform cities into Eco-cities to maintain the ecological balance in the atmosphere.
- The government of all the countries need to work together to bring global changes.
Why to Save Earth
There is urgent need to save our earth because of the continuous rising in global temperature, melting of polar ice caps, bleaching of coral reefs, and increasing risks of tsunami, floods and droughts. The condition of our mother earth is getting poor which is reducing the chances of healthy life. Earth is the most important source of all the basic elements required to keep us alive. Bad human activities have given rise to various environmental issues due to release of toxic fumes, chemical wastes and excessive noise.
Government has taken various effective steps regarding save earth, save life and save earth, save environment in order to continue the healthy life on the earth. Without earth, life is not possible anywhere in the universe. Human activities related to the destruction of natural resources of earth are impacting the earth environment very badly. So, it is our sole responsibility to save the earth by practicing Eco-friendly activities.
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