Hello,

• Forests are called as lungs of Earth
• They provide clean air
• They are the reservoir of life giving oxygen
• Forests increase the amount of oxygen and reduce the Carbon dioxide in the environment. It keeps the balance between carbon dioxide and oxygen
• They reduce the pollution.
• They produce humus and soil fertility.
• It is a maintenance of wildlife habitat.
• It provides food, timber, fuel and bioproducts, raw material for paper industries.
• Agriculture and animal husbandry depends on the forests and forest lands
• Forests maintain and improve the atmosphere's moisture content. It helps to determine the rainfall in an area
• Forests are the natural absorbers of rain water. Maintain and regulate water flow to the lower layers of soil. They reduce the speed of strong winds and trap dust and gases.
• They are the vital storehouses of carbon
• When forests are destroyed ( cut & cleared ) to make a way for agriculture Or grazing or any other activities , they emit CO2 and other greenhouse gases into the atmosphere.
• This contributes to climate change.

Thus, forests support ecological system and moderate global warming

Hope it helps