Countries must carefully weigh desalination's potential for good with its steep costs and harmful environmental impact.

Countries must carefully weigh desalination's potential for good with its steep costs and harmful environmental impact.
World leaders unveil market solutions at the COP26 conference.
The money spent on campaigns isn't a waste, it’s an investment in our democracy.
Serbia takes their shot on an unusual plan to vaccinate Serbs — and the rest of the world.