Five warning signs that rivers are polluted—even when they look clean

After months of relentlessly miserable weather for most of the UK, spring brings renewed enthusiasm for spending time outdoors hiking, wild swimming, paddling, or on walks.
UN Environment Programme

Humanity’s presence in space is expanding. So, too, are the environmental challenges.

The space race is accelerating, but its environmental footprint is growing. Discover how space activity is affecting Earth’s ...