The purpose of ecologists’ job is to study the 1) of people and their environment. They are concerned with 2) of environment.
One of the ecological key ideas is the idea of 3 development. The methods used in their work include collecting air, water, plants 4); analyzing the collected data; making 5) models in order to evaluate possible solutions.
The purpose of industrial hygienists’ work is to minimize 6)at a workplace and to improve working 7)
Harmful factors at an enterprise include dust, vapors, chemicals, 8) noise, radioactivity. One of the tasks on industrial hygienists is to test health equipment on 9) They make recommendations on improving 10of worker.

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