1. Global Warming
... volcanic eruptions to name a few. Such natural causes have created a series of ice ages on Earth. Over more recent years humans have caused many changes to the Earth which is a major cause for global warming. The burning of fossil fuels, deforestation, landfills, methane from rice cultivation and cattle raising are all examples of man-made greenhouse effect and global warming. The ... was the protection of the ozone layer with the Montreal Protocol. Then a promise to do something about the climate change was made in the Framework Convention in 1992 in Rio de Janeiro. Kyoto, Japan in 199...
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