US
US, China ratify Paris climate agreement together
Observers laud cooperation between world’s two biggest carbon polluters as “a pivotal moment for our planet” as G20 gathers in Hangzhou
Mexico, Ontario, Quebec pledge carbon market cooperation
Advocates say emissions trading agreement will help to cut the cost of meeting climate goals
G20 will blow the Paris climate targets – report
Proposed cuts are “far from sufficient” and must be six times greater by 2030 to stop the world warming beyond 2C, a study finds on the eve of the G20 leaders meeting
US, India edge towards ‘biggest climate win’ in 2016
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
California passes ambitious climate targets
New law requires the US economic powerhouse to cut its emissions by 40% below 1990 levels by 2030
US gas now a bigger carbon polluter than coal
Coal has entered a structural decline, say experts, leaving gas as the second largest source of carbon behind petroleum
Why are US multinationals splurging on renewables?
Falling costs and rising carbon risks are leading companies located in areas blessed with wind and solar to invest in renewables
US Republican ex-environment chiefs endorse Hillary Clinton
Former heads of the US Environmental Protection Agency warn Donald Trump would set back climate cooperation for decades
The Republicans fleeing Trump because of climate change
Libertarian Party emerges as unlikely home for climate-concerned Republicans as Donald Trump rails against green laws
UN: climate-friendly flying could cost $60 billion a year
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
Hillary Clinton: Paris climate deal must be enforced
Keynote speech from Democrat candidate identifies climate change and multilateralism as core priorities for campaign
Hollywood stars target Trump climate change denial
Not reality TV: celebs highlight threat to US posed by rising sea levels, wildfires, drought and crop failure linked to fossil fuel emissions
US Democrats endorse WW2-scale mobilisation on climate challenge
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
Aviation fumes: Obama targets final piece of climate legacy
US scientific assessment emphasises tackling plane emissions is central to country’s climate strategy, paves way for regulations
Wikileaks emails show Democrats see climate as weapon
Huge correspondence leak causes trouble for Democrats ahead of Philadelphia convention – but illustrates use of climate to target Donald Trump
John Kerry: HFCs are a critical piece of the climate puzzle
US Secretary of State tells envoys at Montreal Protocol talks in Vienna their moment to contribute to a global warming solution has come
Trump: I’ll get miners back to work as US president
Billionaire businessman-turned politician places coal and steel at heart of economic plan, delivers veiled threat to green regulations
Cooler coolants: closing in on a climate deal in Vienna
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
Ban Ki-moon calls on world to unite behind Paris climate deal
UN encourages countries to ratify Paris deal, as US weather agency NOAA reports June heat shattered global records
Weekly wrap: Clinton proposes ambitious US climate platform
This week’s top climate politics and policy stories. Sign up to have our Friday briefing and Monday’s crib notes sent to your inbox