It also means that you have been that friend's number one best friend out of all of their friends as well, for two months. Red heart: After the yellow heart comes to the red heart â your BFF â if you remain each other's number one best friends for a period of two weeks.
Carbon dioxide is actually a very important greenhouse gas, and an important part of the process that makes Earth so pleasant to live on. The amount being generated, however, started to outstrip the Earth's abilities to handle it in the 20th century.nd CO2 is a greenhouse gas as is oxygen, water vapor and nitrogen. CO2 along with the other trap heat between the earths crust and the atmosphere, not letting it escape. This in turn raises the temperature of the earth.
A carbon sink is anything that absorbs more carbon that it releases, whilst a carbon source is anything that releases more carbon than is absorb.Forests, soils, oceans and the atmosphere all store carbon and this carbon moves between them in a continuous cycle.This constant movement of carbon means that forests act as sources or sinks at different times. Not all stores of carbon are naturally cursed with such fluctuations however.In the context of climate change, the most important carbon stores are fossil fuel deposits as they have the unique benefit of being buried deep inside the earth, naturally separated from the carbon cycling in the atmosphere.ecause of this increase in atmospheric carbon, a lot of emphasis and hope has been put into the ability of trees, other plants and the soil to temporarily sink the carbon that fossil fuel burning releases into the atmosphere.