The world’s nations will wrap up negotiating a treaty this weekend to address the global crisis of plastic pollution.

Many nations hope to reduce the half a billion tons of plastic made each year. But pushback from plastic and oil producers, and Donald Trump’s election, could scuttle an agreement.

Plastic is ubiquitous. Globally, around 400 million tonnes of new plastic are produced each year. Without improvements to laws, plastic production might increase by nearly 70 per cent by 2040. A deal