The latest assessment report by the Intergovernmental Panel on Climate Change(IPCC) has considered three major techniques to reduce sunlight reaching the Earth: orbiting mirrors, sulphur particle schemes and projects for enhancing cloud cover. Another idea is by increasing agricultural productivity and forestry. 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.
Do you have any ideas?
Look at some ideas:
1. Ocean Pumps: Pump deep cold water water to the sea. Cold ocean water is considered to be more 'productive' than warmer water because it contains more lifeforms which brings more lifeforms into contact with the atmosphere and its CO2. And these lifeforms are vital for absorbing CO2. These lifeforms would absorb CO2, die and then sink to the ocean floor, storing the carbon away for millennia.
2. Sulphur Blanket: Another idea is making a 'blanket' of sulphur that would block the Sun's rays from reaching Earth. Scientist has proposed as "hundreds of rockets filled with sulphur being blasted into the stratosphere".
3. Mirrors: This idea introduces the use of mirrors to cut radiation from the Sun by firing giant mirrors into its orbit. They are thinking about 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. The screen wouldn't completely block sunlight but would filter infra-red radiation.
4. Cloud Shield: 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. This plan is one of the cheaper ideas for countering rising carbon dioxide levels and is relatively low-tech.
5. Synthetic trees: Scientists are proposing a surprise technological variant- synthetic trees. These trees would not grow or flower or leaf - but they would absorb carbon dioxide.One of the 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.
6. Forests of the seas: Another idea is to increase blooms of plankton and algae on 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. 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.
Please add your thought and ideas that may solve today's key environmental problem.