Global Warming and Pollution

Reduce pollution, let water find its own level.
The annual discharge of industrial wastewater and sewage in cities and township increased from 23.9 billion cubic meters in 1980 to 73.1 billion cu m in 2006. A huge volume of untreated wastewater is still being discharged into rivers.
As a result, water pollution has worsened in most rivers [...]

The meaning of pollution:
Pollution is the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem.
Forms and types of pollution:
Air pollution.
Water pollution.
Soil pollution.
Radioactive contamination.
Noise pollution.
Light and visual pollution.
Smog, acid rain, the hole in the ozone layer and the greenhouse effect between others.
All are serious problems for our world, and [...]