Causes of global warming

Carbon dioxide (CO2) is one of the main causes of global warming. CO2 is coming from burned fossils, cars, trucks, airplanes, building structures and factories. These are the main things that produce most of the CO2 in the atmosphere. Methane comes after CO2 by the amount, but methane is more than 20 times as effective as CO2 in holding heat inside the earth. Also nitrous oxide (NO2) known as “laughing gas” is counted as one of the causes of global warming. It is a colorless and nonflammable gas. Nitrous oxide is naturally produced by oceans and rainforests. Nylon, nitric acid production and fertilizers in agriculture are man-made sources of nitrous oxide. Sunlight helps in breaking down the NO2, but CO2 is interrupting this operation. Naturally, plants help in the CO2 cycle, because they take CO2 and convert it to oxygen. But humans are cutting down trees for wood needs and increasing the wood supply. This operation is named deforestation.