Respuesta :
The rate of CO₂ concentration increase ( ppm / yr ) from 1975 to 2012:
1971-1980 = 1.35 ( ppm / yr )
1981-1990 = 1.56 ( ppm / yr )
1991- 2000 = 1.55 ( ppm / yr )
2001- 2012 = 2.04 ( ppm / yr )
Carbon dioxide concentrations are rising typically due to the fossil fuels that human beings are burning for strength. Fossil fuels like coal and oil include carbon that vegetation pulled out of the atmosphere through photosynthesis over many tens of millions of years; we are returning that carbon to the environment in only a few hundred.
Due to the fact the northern hemisphere consists of much extra land than the southern hemisphere – which is more often than not covered with the aid of ocean – the quantity of carbon dioxide inside the atmosphere will increase universal all through the northern iciness.
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