The good news is world population growth rate decreases systematically and is expected to reach zero by 2050, thanks to urbanisation and women's education.

Soil erosion is second only to population growth as the biggest environmental problem the world faces. Yet, the problem, which is growing ever more critical, is being ignored because who gets excited about dirt?

A finite world can support only a finite population; therefore, population growth must eventually equal zero.

By improving health, empowering women, population growth comes down.

Immigration is one of the leading contributors to population growth.

Our population continues to grow, so we have had to add positions to handle that growth,