The diagram below shows what happens to pollutants from farming and industry once in a river system. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The diagram illustrates the process by which pollutants from farming and industry enter a river system and the subsequent effects on the environment. Overall, it can be seen that waste from human activity flows into rivers, where it triggers chemical reactions that eventually lead to the depletion of oxygen and the destruction of aquatic life. […]

Given is a diagram illustrating the interaction between two types of pollutants – namely fertilizers from farming and heavy metals produced by industry – and the ecosystem of a fast flowing river. The fertilizers are denoted by blue spots, while the heavy metals are marked as black sports. From the information supplied, it is evident […]