When forests are cut down, we lose one of the Earth’s most effective natural air conditioners. Trees cool the land and air by providing shade and releasing moisture through transpiration, so their removal makes local climates hotter and drier. Deforestation also reduces the planet’s ability to absorb carbon dioxide, one of the main greenhouse gases. As more CO₂ stays in the atmosphere, it traps heat and contributes to global warming. The combined effect is felt both regionally—through harsher heat waves, changing rainfall patterns, and soil degradation—and globally, by accelerating climate change. In simple terms, when we lose forests, we lose nature’s cooling system, and the Earth’s thermostat gets turned up.

Trees act as absorbers of CO2, solar radiation and terrestrial radiation that account for the temperatures of the earth's atmosphere. Hence, the absence of trees accelerated by deforestation implies maximum solar radiation reaches the earth's surface as short waves, and maximum is radiated back to the atmosphere as long waves. Eventually, the temperatures at both local and global levels will increase.