The world currently produces more than 50 million tonnes of “mismanaged” plastic waste each year, and some researchers project this flood of pollution into the environment will double by mid-century.

Thousands of teenagers across Europe have tracked plastic pollution in rivers, and the data they collected is starting to make waves.By Tom CassauwersAlong a small stream in Spain, groups of teenagers ...

The surging tide of microplastics is already an environmental and health threat, but as the world heats up — driving increasingly extreme weather — it’s transforming them into “more mobile, persistent ...