Explanation:

• Carbon-di-oxide has the highest contribution to global warming.
• Global warming is a gradual increase in the earth’s temperature.
• In the greenhouse, effect heat is trapped close to the surface of the Earth by “greenhouse gases.”

Greenhouse gases:

• Carbon dioxide (CO2)
• Methane (CH4)
• Nitrous oxide (N2O)
• Hydrofluorocarbons (HFCs)
• Perfluorocarbons (PFCs)
• Sulphur hexafluoride (SF6).

Causes of Global Warming: Man-made causes of global warming are :

• Deforestation
• Use of Vehicles
• Chlorofluorocarbon
• Industrial Development
• Agriculture
• Overpopulation

Natural causes of global warming are:

• Volcanoes
• Water Vapour
• Melting Permafrost
• Forest Blazes

Source: Shankar