1. benefits others

2. misuses benefits

3. benefits from an investment

4. derives advantage from something

1. widespread and short-lived

2. not widespread

3. responsible for health problems

4. limited in their effects

1. abundance of food

2. disturbance in the ecological system

3. isturbance in the weather patterns

4. dwater pollution

1. Over

2. with

3. in

4. Between

1. from

2. to

3. of

4. Off