Figures published on Wednesday by Eco-Schools show they are spending £459 million each year on electricity, water, clearing up litter and stationery.

But with a few changes these bills could be cut and the environment could be protected.

They say that protecting the environment has health benefits too.

Children who walk to school will get fitter, this is particularly important since the latest figures show that one in three children is overweight.

Britain already has 4,500 Eco-Schools and they have done loads of good work over the last few years.

One school in Belfast recycled 1,000 cans as part of its effort and a school near Manchester transformed their grubby grounds into a nature reserve for everyone to enjoy.

A spokesperson for Eco-Schools said: "When you talk about the environment, people often think about global warming and massive issues they feel they can do nothing about.