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The proliferation of Internet usage has given birth to a new generation of young people.

the proliferation of pornography and our dramatically enhanced access to it in the last decade or two.

nuclear weapon proliferation

We acknowledge the common threat of nuclear proliferation, particularly from Iran.

Interspecies aggression is oriented towards goals related to reproduction.

A few months later they return to their breeding grounds in the Arctic.

This chemical will prevent germs from breeding.

His politeness shows good breeding.

He is breeding cattle on his farm.

The Chinese government has spent a lot of money on research into successful panda breeding in order to increase their birth rate.

Birth is much, breeding is more.

Just as the female ant after coition loses her wings, which then become superfluous, nay, dangerous for breeding purposes, so for the most part does a woman lose her beauty after giving birth to one or two children; and probably for the same reasons.

Not until the end of the nineteenth century, did plant breeding become a scientific discipline.

Cattle breeding is one of the farmer's occupations and the animals are carefully selected according to their breed.

What a surprise! The onsen lodge had turned into a fish breeding farm.

dog breeding

Vice President Joseph Biden summarized this important fact in Munich earlier this year by saying that “Poor societies and dysfunctional states can become breeding grounds for extremism, conflict and disease.”

the world leader in cattle breeding technology

Mary used to have a breeding of rats.

It’s one of the basic rules of breeding,