Fifty nations are now taking action to reduce plastic pollution, according to the biggest report so far from the UN.

It reveals that the Galapagos will ban single-use plastics, Sri Lanka will ban styrofoam and China is insisting on biodegradable bags.

But the authors warn that far more needs to be done to reduce the vast flow of plastic into rivers and oceans.

What’s more, they say, good policies to curb plastic waste in many nations have failed because of poor enforcement.

Action against plastic waste has many drivers across the world. In the UK it has been stimulated by media coverage.

In many developing countries, plastic bags are causing floods by blocking drains, or they’re being eaten by cattle.

The report says policies to combat plastic waste have had mixed results. In Cameroon, plastic bags are banned and households are paid for every kilo of plastic waste they collect, but still plastic bags are being smuggled in.

In several countries, rules on plastic exist but are poorly enforced.