Optimum Population Trust



Concerned about the speed of global warming?
About food, water and energy scarcity – the effects of overpopulation on a plundered planet?
About the UK’s failure to stabilise its own population?


Support the Optimum Population Trust
Support research into optimum population sizes
Campaign for a lower population in the UK
Sign our Stop at Two pledge!

World population is projected to rise from today’s 6.8 billion to 9.1 billion in 2050.*  The World Population Clock is ticking.  We are rapidly destabilising our climate and destroying the natural world on which we depend for future life.


The Optimum Population Trust is absolutely opposed to any form of coercion in family planning.

The Optimum Population Trust believes that Earth may not be able to support more than half its present numbers before the end of this century, and that the UK’s long-term sustainable population level may be lower than 30 million.  Research and policy are summarised on this website and available to all members in the OPT Journal.

In the UK, population is officially projected to rise from 60.6 million (mid-2006) to 77 million in 2050 – that’s more than another two Londons.**

* United Nations Population Division, World Population Prospects 2008 Revision, 11 March 2009. ** Mid-2006 based Principal Population Projection, Government Actuary’s Department, and ONS release, both 23 October 2007.

OPT for a sustainable planet

NASA Goddard Space Flight Center Image by Reto
Stockli & Robert Simmon, with MODIS,

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