Climate system

Fuels such as oil, natural gas, and mineral coal – fossilized plant residues – that are buried in the Earth's crust and reached their present state through chemical reactions over long periods of time. They are produced by the continuous decomposition of organic...

Reducing Emissions from Deforestation and Forest Degradation - the concept has evolved to REDD+.

Changes that are directly or indirectly attributed to human activity and alter the composition of the world's atmosphere and that is added to that caused by the natural climatic variability observed over comparable periods.