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Scientists are studying the chemical's effect on the environment.
Any change in lifestyle will have an effect on your health.
The NAFTA agreement has had little effect on the lives of most Americans.
East German companies were suffering the adverse effects of German economic union.
Relaxation can reduce the negative effects of stress on the immune system.
The bold colours in this room create a dramatic effect.
That's exactly the effect I wanted.
Students should learn how they can achieve different stylistic effects in their writing.
This is the British English definition of effect. View American English definition of effect.