Population and the environment

Our numbers have a huge effect on our natural environment. The more of us there are, the bigger the impact on nature. Human population growth is a key driver of biodiversity loss, resource depletion, deforestation, climate emissions and pollution.

In the 1970s, Population Matters Patron Paul Ehrlich and his colleague John Holdren developed an equation to describe our impact on the environment:

I = P x A x T

Where "I" is impact, "P" is population, "A" is affluence and "T" is technology. The "IPAT" equation shows that our numbers, how we live, and the technology we use all have an effect on our finite environment.

See our latest news stories and blog posts about the environment below.

27 June 2019

Condoms cut carbon - Population Matters at the Mass Climate Lobby

Woman drinking water
21 June 2019

No water, no life: Population growth and climate change are fuelling the water crisis

13 June 2019

UN report: Small change in family size, big change in future population


The Time is Now. Mass Lobby 2019

the time is now Robin Maynard
29 May 2019

Are we getting through?

Small family with twins
15 May 2019

Small families around the world share their thoughts

10 May 2019

One million species face extinction unless we address population growth

Winnie and Edu
30 April 2019

Letting the elephant out of the room: Our 2019 Conference


Population Matters - Second submission to Convention on Biodiversity consultation


Kadogo’s Story - Life in a remote Kenyan village

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