GREEN HOUSE gases

There're exist numerous chemical compunds called Greenhouse gases that cause global warming. Many occur naturally, including water vapour, carbon dioxide, methane, nitrous oxide and ozone. Others, with even less inspiring names, like hydro-fluorocarbons, per-fluorocabons, and sulfur hexafluoride, are caused by human activities, including industrial processes, and significantly add to the level of naturally occuring green house gases. Nitrous oxides emissions occur during various agricultural and industrial processes, and when solid waste or fossil fuels are burned. Methane is emitted when organic waste decomposes, whether in landfills or in connection to livestock farming. But it is carbon dioxide (CO2) that is most important of all greenhouse gases as it accounts for around 60 percent of the so-called 'enhanced greenhouse effect'. CO2 is released into the atmosphere by respiration, the burning of solid waste, wood and wood products, fossil fuels, including oil, gas and coal, and deforestation. Every year, humans add over 30 billion tons of carbon dioxide to the atmosphere through these processes, and the amount is estimated to have increased by 30 percent since the industrial revolution beginning around 1750. Humankind wouldn't be viable without CO2, but the future of life on earth is now threatened by producing too much of it.