Despite its huge reliance on old cooling technologies, Delhi can leave a winner from October’s HFC negotiations, argue experts from US green group NRDC
New law requires the US economic powerhouse to cut its emissions by 40% below 1990 levels by 2030
Coal has entered a structural decline, say experts, leaving gas as the second largest source of carbon behind petroleum
Falling costs and rising carbon risks are leading companies located in areas blessed with wind and solar to invest in renewables
Former heads of the US Environmental Protection Agency warn Donald Trump would set back climate cooperation for decades
Libertarian Party emerges as unlikely home for climate-concerned Republicans as Donald Trump rails against green laws
Sourcing biofuels to replace oil will cost billions, but without radical cuts in air traffic or improvements in technology it may be the only solution to cut airline emissions
Keynote speech from Democrat candidate identifies climate change and multilateralism as core priorities for campaign
Not reality TV: celebs highlight threat to US posed by rising sea levels, wildfires, drought and crop failure linked to fossil fuel emissions
If elected president, Hillary Clinton will convene a climate summit in the first 100 days, according to platform endorsed at Democratic National Convention in Philadelphia
US scientific assessment emphasises tackling plane emissions is central to country’s climate strategy, paves way for regulations
Huge correspondence leak causes trouble for Democrats ahead of Philadelphia convention – but illustrates use of climate to target Donald Trump
US Secretary of State tells envoys at Montreal Protocol talks in Vienna their moment to contribute to a global warming solution has come
Billionaire businessman-turned politician places coal and steel at heart of economic plan, delivers veiled threat to green regulations
The US is going all out at Montreal Protocol talks to secure a deal for phasing out HFCs, potent warming gases used in air conditioning
UN encourages countries to ratify Paris deal, as US weather agency NOAA reports June heat shattered global records
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Fossil fuel companies have developed an ‘apparatus’ of climate denial to influence US lawmakers, warns Sheldon Whitehouse
Belief in global warming and policies to tackle greenhouse gas emissions are becoming a key dividing line ahead of the 2016 election
Analysis of statements from over 190 world leaders suggests Republican nominee for White House would be isolated as a climate denier