The clean water act ___ set maximum contaminant levels for drinking water
required industries to reduce or eliminate point source pollution in surface waters
established national ambient air quality standards
requires that pollution control devices be installed on cars and trucks and at factories

Which of the following is an example of competition a. the leaves of a tree prevent a small shrub from getting sunlight. three species of birds feed a different heights in the same tree. b. three species of birds feed at different heights in the same tree c. zebra and giraffe’s feed on different grassland plants d. cats living in two different homes eat the same brand of cat food.