(1) (POLLUTE) is the introduction of contaminants into the (2) (NATURE) environment that cause adverse and (PLEASURE) change. Pollution can take the form of (3) (CHEMISTRY) substances or energy, such as noise, heat, or light.(4) (POLLUTE), the components of pollution, can be either foreign substances/energies or naturally occurring contaminants. Globally human-made pollutants from (5) (CONSTRUCT), mining, agriculture and warfare are increasingly significant in the air pollution equation. China, United States, Russia, India, Mexico, and Japan are the world (6) (LEAD) in air pollution emissions.