Greenhouse gases

Greenhouse gases are responsible for the greenhouse effect and contribute to global warming.

Such gases are for instance carbon dioxide, methane, [nitrous oxide]?, [water vapor]? and [chlorinated fluorocarbons]? (CFCs) such as freon?.

Since beginning of the industrial revolution, the concentrations of many of the greenhouse gases have increased. Carbon dioxide is up 30%, methane over 50%, [nitrous oxide]? 15%. As the concentrations of greenhouse gases in the atmosphere increases the temperature increases, leading to global warming.