Make Smaller - verbs

Verb make less active or intense
Excessive noise may be as damaging to the heart as it is to the ears, leading to higher blood pressure. Many European countries have striven to abate noise pollution.
Verb make or become less
In the early 1980s Cubatao was one of the most polluted cities in the world. Since then hard providences have been taken to diminish pollution.
Verb make less severe or harsh
Princeton professor Robert Socolow is worried that his theory to mitigate global warming in 2004 gave people a false sense of confidence in the face of enormous challenges.
Verb make smaller or less in amount, degree, or size
The US FDA unveiled proposed graphic warning labels designed to spur smokers to quit. --WARNING: Quitting smoking now greatly reduces serious risks to your health.
Verb becoming smaller in size or amount
Axolotls are popular in the aquarium trade and also roasted axolotl is a delicacy in Mexico, further shrinking their numbers.