Having one less child is the biggest contribution anyone can make to leaving a habitable planet

- John Guillebaud

We must not put pressure on people, but by providing information on the population and the environment, and appropriate contraception for everyone (a…

- John Guillebaud

The effect on the planet of having one child less is an order of magnitude greater than all these other things we might do, such as switching off lig…

- John Guillebaud

Should we now explain to UK couples who plan a family that stopping at two children, or at least having one less than first intended, is the simplest…

- John Guillebaud

The greatest thing anyone in Britain could do to help the future of the planet would be to have one less child.

- John Guillebaud