Pollution is undesirable change in the physical,chemical,or biological characteristics of environment including air, water and solid which causes harmful effects to various form of life and property.

A hearing is set for next week on the proposed definition rolled out last month for "Waters of the United States,” which outlines the waterbodies eligible for protection under the federal Clean Water ...

This text is only intended to provide introductory information about the topic. To find out about UNESCO's official position and actions in this field, please consult our relevant webpages and reports ...