Several greenhouse gases are present in Earth's atmosphere, notably carbon dioxide, methane, nitrous oxide and various fluorinated gases. Each of these compounds absorbs light at its own set of frequencies, so together t... More »

The inert gases, also called noble gases, are argon, helium, neon, krypton, xenon and radon. The inert gases are in Group 18, located on the far right of the periodic table. More »

Gases that are lighter than air include water vapor, methane, hot air, hydrogen, neon, nitrogen, ammonia and helium. These gases have a lower density than air, which causes them to rise and float in the atmosphere. More »

Burning fossil fuels leads to global climate change by emitting carbon dioxide and other greenhouse gases that trap heat in the Earth's atmosphere. Extracting and transporting fossil fuels also contribute to air and wate... More »

The main causes of air pollution include the emission of greenhouse gases, such as carbon dioxide, methane, and chlorofluorocarbons, emission from volcanic eruptions and toxic air pollutants emitted by vehicles. The amou... More »

Global pollution statistics indicate trends showing increased emissions of greenhouse gases such as carbon dioxide, methane and fluorinated gases, as of 2015. These trends show global carbon emissions from fossil fuels h... More » Science Environmental Science Pollution

The Earth's atmosphere is primarily made up of nitrogen, oxygen and argon, but it includes trace gases in smaller amounts such as neon, helium, carbon dioxide, methane, nitrous oxide and ozone. The most abundant gases in... More »