Dense forest found in tropical areas of heavy rainfall. The trees are broad-leaved and evergreen, and the vegetation tends to grow in three layers (undergrowth, intermediate trees and shrubs, and very tall trees, which form a canopy)
The introduction of harmful substances or products into the environment.
The composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years.
To treat or process (used or waste materials) so as to make suitable for reuse.
Any source of usable power, as fossil fuel, nuclear fission, electricity, or solar radiation.
To divest or clear of forests or trees.
