Water Quality

Water Quality

A world map displays global climate zones with colors representing varying levels of temperature and precipitation: green for temperate, yellow for arid, orange and red for hotter regions, and blue for wet zones.
The salinity of the oceans is not just a matter of taste. Saltier water behaves differently, too.
A map showing the world's major cities.
According to the CDC, 50 countries worldwide have drinkable tap water. But look closer, and the picture is more nuanced.
earth axis shift
Despite the enormous mass of the Earth, simply depleting our groundwater is changing our axial tilt. Simple Newtonian physics explains why.
Green algae on a lake
Civil engineer Martin Lebek has a brilliant plan to redress the world’s phosphorus imbalance.
Why can’t more rainwater be collected for the long, dry spring and summer when it’s needed?
Flashy desalination technology is more costly and cumbersome than many other solutions.
solar desalination
It could make enough drinking water for a family of four.
blue sky
The sky is blue. The oceans are blue. While science can explain them both, the reasons for each are entirely different.
When we try to recreate simpler versions of natural ecosystems, we invariably make mistakes, argues author and biologist Rob Dunn.