Ninth U.S. city sues big oil firms over climate change
"Each new lawsuit is incrementally more pressure on the oil companies"
Rising tide of innovation at Davos to keep plastic out of the sea
More than 8 million tonnes of plastics enter the ocean each year
Mosquito-packed drones could give extra bite to Zika fight
"It's not about technology, it's not about drones; it's about people getting less sick"
As droughts surge and traditions wane, nature comes under pressure in Kenya
The need for millions of young Kenyans to earn an income, combined with weakening cultural restrictions on protecting land, are hurting Kenyan nature, older people say
Missing polar bear on vodka bottles highlights climate change threat
It's a "nod to what the future will look like"
Artificially cooling planet may pose threat to plants, animals
"If geoengineering ever stopped abruptly, it would be devastating"
Austria to sue EU over allowing expansion of Hungary nuclear plant
"For us, nuclear energy is neither a sustainable form of energy supply, nor is it an answer to climate change"
From hunting to hiking: biggest threats to protected areas identified
"It's partly because of an increase in urban demand - big cities and towns are growing and the demand for wildlife to eat is growing"
Germany faces risks, higher costs without focus on green finance-report
Failing to take a holistic approach portends significant risks for investors and citizens in coming years
India restricts use of imported petcoke in Delhi region
India is the world's biggest consumer of petroleum coke, which 11 percent more greenhouse gases than coal