Climate change, growing populations and energy-intensive agriculture are all increasing the pressure on the planet's water resources. Making better use of waste water could help ease the problem. 

GLOBAL IDEAS talked to water expert Ned Breslin about what's needed to ensure that populations in developing nations get reliable access to clean and safe water. 

The Peruvian Andes are home to the world's largest tropical body of ice. But it's melting at a rapid pace, exacerbating poverty in the process and jeopardizing the economy of the entire country.  

Hydroelectric power may be considered one of the cleanest forms of energy but large dams are often blamed for massive environmental damage. A project in Honduras shows how things can be done differently.