Ultrafine particles are approximately one-thousandth the width of a human hair. But because of their tiny size, they are easily inhaled – and typically more dangerous than larger particles.

People living near these industries, as well as emergency responders, often have few details about the chemicals inside. New interactive maps pinpoint the risks.

People living near these industries and emergency responders often have few details about the chemicals inside. New interactive maps pinpoint the risks.

Pollution solutions start with public pressure, often in the face of industry pushback and slow-moving political responses.

Pollution solutions start with public pressure, often in the face of industry pushback and slow-moving political responses.

Some materials react and generate potentially helpful particles when exposed to light. Analytical AI can help scientists sort through materials to find ones with this property.

Artificial sweeteners aren’t metabolised by the human body, so they are excreted – and that’s where the environmental problems begin.

A leading driver of this seaweed invasion is pollution, carried down rivers and into the Atlantic Ocean from the continents.

A leading driver of this seaweed invasion is pollution, carried down rivers and into the Atlantic Ocean from the continents.

New research shows how old lead mines are polluting the environment and surrounding wildlife and farmland with legacy contaminants.