What's the effect of tropical rain forest on climate?

Tropical rain forests can regulate the climate.

The dense canopy of tropical rain forest can absorb, scatter and reflect some solar radiation energy in summer, thus reducing ground warming. Although most forest leaves wither in winter, dense branches can still reduce the wind speed blowing across the ground, reduce air flow, and play a role in heat preservation and moisture preservation. According to the measurement, the temperature of forest in summer is 2 ~ 4℃ lower than that of urban open space, and the relative humidity is 15 ~ 25% higher than that of asphalt concrete cement pavement 10 ~ 20℃. Because the roots of trees go deep into the ground, they constantly absorb the water in the deep soil for trees to transpiration, which makes the forest form fog normally and increases precipitation. Through analysis and comparison, the annual precipitation in forest areas is more than that in non-forest areas 10 ~ 30%. According to foreign reports, in order to protect the natural environment, the green coverage rate of forests should account for more than 25% of the total area.