USA

Barack Obama hails 'turning point' for the global effort to tackle climate change, as superpowers formally adopt historic agreement ahead of G20 summit

Research to look at reducing nitrogen fertilisers at farms in the warmest regions, to combat air pollution and CO2 emissions

President slams climate sceptic Republicans as he unveils raft of new initiatives to help Western US tackle climate impacts

Project will see 1,000 wind turbines constructed in several sites in Iowa as utility strives to move towards 100 per cent renewables

Forget your MakerBot. The Department of Energy has a plan for a new production paradigm

Local media reports suggest Brazil, the US and China could all formally approve Paris Agreement in the coming weeks

New goal would require US state to cut emissions 40 per cent below 1990 levels by 2030

Report by US campaign group NextGen Climate finds millennials could suffer $8.8tn in lost earnings unless action taken on climate change

Rising demand and falling costs fuels optimism turbine maker is set for bumper year

There is widespread support for a new Environmental Goods Agreement, and yet it still faces significant challenges