Answer:
Global warming refers to the increase in the average temperature of the earth.
It is caused by many factors such as:
Greenhouse gases: Gases like carbon dioxide, methane, water vapors et cetera cause the greenhouse effect and increase the temperature of the earth.
Deforestation: Increased deforestation, urbanization, desertification et cetera also contributed a lot to global warming. Decreased amount of vegetation disturbs the carbon and water cycle due to which the amount of greenhouse gases keeps on increasing the atmosphere.
Pollution: Release of pollutants like sulfur, aerosols, organic carbon, CFC, HCFC et cetera in the atmosphere also increases global warming.
Changes in the sun's energy
