Video Duration 02 minutes 22 seconds

UK scientists look for sustainable ways of raising livestock

Cows and sheep are responsible for 14 percent of global greenhouse gases – the same as all the cars, trucks and planes in the world.

Some climate change experts argue that a vegetarian diet is key to protecting the environment.

Sheep and cows produce methane gas – a toxic substance – and graze on land that could be used to grow crops.

But some scientists at a research centre in the UK disagree and are looking at sustainable ways of raising livestock.

Al Jazeera’s Jessica Baldwin has more from Devon in western England.