Pollution is the introduction of contaminants into the natural environment that cause adverse changes. There are several types of pollution discussed in the document, including air, noise, soil, water, light and litter pollution. Air pollution involves direct release of chemicals into the environment. Noise pollution is an increase in unpleasant sounds that adversely affect humans. Soil pollution contaminates soil by releasing harmful substances. Water pollution affects aquatic life and humans rely on water. Various types of pollution can cause human health issues like respiratory diseases and hearing loss. Pollution control aims to manage emissions and effluents through practices like recycling, reusing, and waste minimization.