To determine the degree of environmental pollution, ecologists use?

For this, studies of water, soil, air, and plant fruits are used. The researcher takes the required material in several places for a more accurate result. Further, with the help of special chemical analyzes, samples are analyzed for the presence of certain substances. Samples can be searched for certain substances, or they can conduct a standard study. They are looking for certain substances after man-made disasters to find out the level of threat to the environment and its permanent inhabitants.