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Planet on a Plate

Chemical Pollution

About 135 million tonnes of nitrogen and 58 million tons of phosphorous came from the global manure heap in 2004 – cattle accounting for 58 per cent, pigs around 32 per cent and chickens and other poultry seven per cent.

Global Warming

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Carbon dioxide (CO2), methane and nitrous oxide are gases that are found in the atmosphere. They're like the glass of a greenhouse, trapping the sun’s heat and reflecting it back to earth. It's all completely natural and without it we wouldn't be able to live on this world of ours because it would be too cold. This warming keeps temeperatures about 33ºC/92ºF higher than they would otherwise be.