Around the world 1.3 billion tons of food is wasted every year. A more efficient food supply is a key to feeding an expected world population of 9 billion by 2050.
As Brazil prepares to host the Rio+20 conference this month, its own rapid urbanization highlights the health and infrastructure challenges of promoting sustainable cities worldwide.
The June 20-22 UN sustainable development conference in Rio, 20 years after the first Earth Summit, comes with the latest grave warnings for the planet. Does alarmist rhetoric still work to alter consumer behavior toward the environment?
Political differences, the worldwide financial crisis and a divergence of priorities among rich and poor countries are barriers to an agreement on a future negotiating path accordig to UN Secretary-General Ban Ki-moon.
Saving half the water lost through leaky pipes and ill-maintained sewage networks could supply 90 million people with clean water, says a UN report released on World Water Day.
When peatlands disappear, stored carbon dioxide gets released into the atmosphere.
Nine more persistent chemicals banned worldwide.