... in these that are not biodegradable can remain dangerous for a long time. When an animal eats a plant that's been treated with certain non-degradable chemicals, the chemicals are absorbed into the tissues or the organs of the animals. When other animals feed on a contaminated animal, the chemicals are passed up to ... them. As it goes up through the food chain, the chemical becomes more harmful, so animals at the top of the food chains may suffer cancers, reproductive problems, and death. ... pollute water supplies. They can reach toxic levels when animals eat one another. 5. Excess Org...

• Word Count: 975
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School

... lake by adding too much nutrient matter. Sedimentation can also cover stream bed gravel where nmany fish lay their eggs. Excess Organic Matter, fertilizers and other nutrients used to promote plant growth on farms and in gardens may fine their way into water. At first the nutrients will help the plants and algae in the water grow, but when they die ... streams by rainwater. The chemicals in these that are not biodegradable can remain dangerous for a long time. When an animal eats a plant that is been treated with certain non- degradable chemicals, the chemicals are absorbed into the tis...

• Word Count: 1051
• Approx Pages: 4
• Grade Level: High School