Population growth

Can broadband stop depopulation in the Outer Hebrides?
Grimsay in the Outer Hebrides now has superfast broadband, and there's hope it will help business and the population.

How can we feed 11 billion people?

The world’s population is set to grow to 11 billion. Can we feed this number of people?
The world’s population is set to grow from 7.7 to 11 billion by the end of this century. The challenge is to produce enough food to feed this number of people. In the 1960s the Green Revolution provided answers to similar problems – but the projected population growth of the future is on a much greater scale than before, and so new measures are required. In east Africa they’re working to reduce the amount of food that’s lost before it even gets to market – globally this stands at around 30 per cent. In the United States scientists are working to improve the natural process of photosynthesis – to make plants themselves function more efficiently. And in India they’re working to preserve genetic diversity – conserving rice varieties that can flourish in salt water or in conditions of drought.

Presenter: Kate Lamble
Producer: Tim Mansel