what is ch4

Methane is a chemical compound with the chemical formula CH4. It is the simplest alkane and the main constituent of natural gas. Methane is a colorless, odorless, and highly flammable gas that is composed of carbon and hydrogen. It is a tetrahedral molecule that has four equivalent C-H bonds. Methane is lighter than air and is easily ignited. It is produced by both geological and biological processes and is found both below ground and under the seafloor. Methane is a potent greenhouse gas that contributes to climate change by increasing warming. The Earths atmospheric methane concentration has increased by about 160% since 1750, with the overwhelming percentage caused by human activity.