LONDON, January 24, 2013 (LifeSiteNews.com) - Well-known TV presenter and environmental activist Sir David Attenborough has a dire warning for humanity - we need to die off of our own volition or mother nature will do the job for us.

Attenborough, famous for hosting numerous nature documentaries over the span of the past six decades, told Britain's Radio Times that humans are a plague on the earth and the only way to save the planet is to limit human population growth.

“We are a plague on the earth. It’s coming home to roost over the next 50 years or so. It’s not just climate change; it’s sheer space, places to grow food for this enormous horde," Attenborough said.

"Either we limit our population growth or the natural world will do it for us, and the natural world is doing it for us right now.”

Attenborough is best known for his "Life on Earth" series of wildlife documentaries, as well as for a previous statement extolling the virtues of saving the environment by eliminating people.

"Maybe it is time that instead of controlling the environment for the benefit of the population, we should control the population to ensure the survival of the environment," Attenborough is widely quoted to have said in a letter to John Guillebaud, Professor of Family Planning and Reproductive Health at University College London.

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Guillebaud is also a patron of the UK-based “Population Matters,” a pro-abortion radical environmentalist organization formerly known as the Optimum Population Trust.

In 2009 Attenborough himself became a patron of Population Matters. The group has advocated for a reduction of Britain's population by half using a government-enforced two-child policy, similar to the one-child policy of the People’s Republic of China.

A 2009 report by the Optimum Population Trust (Population Matters) that appeared in the Guardian suggested that people in wealthy first-world countries should "offset" the carbon cost of their jet-setting lifestyles by paying to prevent the births of poor children in the developing world.

The Optimum Population Trust (OPT) claimed that the 10 metric tons of carbon emitted by a single return flight from London to Sydney could be "offset" by "enabling the avoidance of one unwanted birth in a country such as Kenya."

"Based on the study's findings, it is proposed that family planning methods should be a primary tool in the optimum strategy for reducing carbon emissions," the report said.

OPT insisted that only "unwanted" children would be targeted for elimination by the scheme that would provide artificial contraception and abortion to those in developing countries who currently cannot obtain it.