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.
Carbon is one of the most important elements to life on planet Earth. It forms more compounds than any other element and forms the basis to all plant and animal life. Carbon is the fourth most abundant element in the universe by mass and the second most abundant element in the human body. Carbon is constantly cycled through the Earth's oceans, plant life, animal life, and atmosphere. Click here to learn more about the carbon cycle.