Boyd Cohen

Crunching a list of variables about innovation and sustainability, we rank the world’s smartest cities, from New York to Hong Kong (and with an unexpected winner)

Stephanie Pappas

The world's biodiversity is down 30 percent since the 1970s, according to a new report, with tropical species taking the biggest hit. And if humanity continues as it has been, the picture could get bleaker.

Experiments may dramatically underestimate how plants will respond to climate change in the future.

Jon R. Luoma

Dan Collyns

Five thousand metres above the most biodiverse corner of the Amazon, tropical ecologist Greg Asner and his team see a kaleidoscope of colours among a mass of green.

John Vidal

Ecological 'kings of the jungle' being toppled by forest fragmentation, severe drought and new pests and diseases

Gopal Sharma

BARAHBISE, Nepal, Looking at the swirling grey waters of the Bhote Koshi River, Ratna Kaji remembers when it turned into a "monster," leaving behind a trail of death and destruction.

MORT ROSENBLUM and MAR CABRA

TALCAHUANO, Chile — Eric Pineda, a dock agent in this old port south of Santiago, peered deep into the Achernar’s hold at a measly 10 tons of jack mackerel — the catch after four days in waters once so rich they filled the 17-meter fishing boat in a few hours.

John Vidal

By 2050 there will be another 2.5 billion people on the planet. How to feed them? Science's answer: a diet of algae, insects and meat grown in a lab

United Nations

The report of the United Nations Secretary-General's High-Level Panel on Global Sustainability.