Greenhouse gases (GHG)

Gaseous constituents of the atmosphere, from natural or anthropic sources, that absorb and re-emit infrared radiation. The UNFCCC and Kyoto Protocol count for carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), and sulfur hexafluoride (SF₆), accompanied by two families of gases – hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) .

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Diffusion in the oceans

The process through which the atmosphere and water continuously exchange molecules of carbon dioxide. The diffusion of carbon dioxide into the oceans accounts for almost half of the carbon extracted from the atmosphere. The colder oceans absorb more CO2 than warmer...

Renewable energy

It is the energy derived from sources that do not use exhaustible fuels (for example, water – hydroelectric power, wind – wind energy, Sun – solar energy, tides, and geothermal sources). Some combustible materials, such as biomass, can also be considered renewable....

Climate change

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.