How does Ecology relate to environmental science?

Ecology is the study of how organisms interact with their environment and each other. An ecologist may study the relationship between bees and the plant bees pollinate. however environmental scientist might investigate how the nesting behavior of bees is influenced by human activity such as the planting of suburban landscaping. Evolution results in organisms that are best-suited to survive and reproduce in a given environment. Another way of saying the same thing is that ecological (environmental) pressures "choose," by Natural Selection, the direction of evolution.