Well, to understand this, you will have to first sit in a black car that has been parked for a while under the sun. Do you notice that the heat inside the car is simply unbearable?
The darkness within rainforests acts like the black car, absorbing heat from the Sun. Beneath the dense canopy, the forest remains warm and constantly damp. This warm and wet weather causes the evaporation of large quantities of water into the air, resulting in cloud formation.
Since the air above the forest roof is cooler than its hot interiors, the clouds condense and fall as rain. These clouds also drift away to distant mid-latitudes and are seen to cause rainfall even in Europe and Australia. Thus rainforests play a major role in rainfall.
Rainforests absorb large quantities of carbon dioxide from the atmosphere and hold high carbon content in their biomass. When trees are cut down massively, this carbon escapes into the atmosphere as carbon dioxide, a harmful greenhouse gas. Combustion of various fossil fuels and the burning and decomposition of paper and pulp from these forests also increase the rate of carbon dioxide emissions.
Just like the glass of a green-house, this atmospheric carbon dioxide traps heat from the sun. The subsequent rise in overall temperature results in global warming thereby causing drastic changes in the global weather pattern.
Picture Credit : Google
