Each year, the effects of population growth on natural resources and the environment are being recognized.

FORBES: U.S. Needs Immigration Reform - Part 3

Without going into the specific reasons for immigration or their merits (or demerits), it is enough to note that the political leadership in the United States must consider the effects of population growth on natural resources and the environment as it considers immigration reform.

FORBES: U.S. Needs Immigration Reform - Part 3

Providing modern contraception also has the potential to stem population growth and relieve human pressure on the environment and natural resources.

CNN: The elephant in the room at Rio summit

Although there is no early prospect of a global shortage of any of the earth's resources, a larger population does change the earth and its environment, removing forests, cultivating land or building on it, and driving out other species, and that is itself a cause for legitimate concern.

ECONOMIST: A Survey of the 20th Century