California Senator has previously slammed President Trump's scientific illiteracy and backed plans for a $10tr net zero investment drive
Teenage activist claims 'it doesn't take a college degree in economics' to realise world is on course to blow a hole in 1.5C carbon budget
President announces US will join Trillion Trees initiative to grow, save, and better protect one trillion trees around the world by 2050
China 2022 CO2 peak, Germany coal phase-out plans, and US Democrats debate climate action - a need-to-know round-up of this week's global green business news
Beyond Carbon will work with local and state actors to drive clean energy policy, close coal plants and ensure no new fossil fuel power is built
'The science shows that you're wrong': Will British businesses challenge Trump over their climate fears?
The US President will meet with Theresa May and businesses in the UK this week - but will they really be bold enough to raise their concerns about US climate policy?
All the news from the last 24 hours in Katowice
US President sceptical of research from his own administration suggesting climate change will cost US economy billions of dollars
French President rejects isolationism and calls for global unity on tackling climate change in passionate speech to UN General Assembly
President Trump is rarely nature's friend, but he has just ordered all US federal buildings to improve their energy performance, explains Andrew Warren of the British Energy Efficiency Federation
Cities, states and regions alone could reduce global greenhouse gas emissions by up to 2.2 gigatonnes by 2030 according to new research - but is that enough to avoid dangerous warming?
EPA proposes 'Affordable Clean Energy Rule', predicting relaxation of emissions rules will cut coal power polluters' compliance costs by up to $400m a year
135 UK scientists urge Theresa May to challenge President Trump on climate change when he visits this week, arguing US inaction threatens UK's national security
Apple announces renewables milestone, as company sets out opposition to EPA attempts to scrap Clean Power Plan
Latest quarterly data confirms continued strong performance for UK renewables sector, as clean power generation in the US keeps growing
President's protectionist levy widely criticised as both pointless and damaging to US manufacturing, but could the tariffs soon be struck down by the WTO?
But President tells reporters the global climate change accord remains a 'bad deal' for US business
Despite President Trump's best efforts US power system looks set to become ever more dependent on renewables, while coal continues its demise
Chinese President urges global cooperation on climate change as he delivers coded warning to Trump in address to economic summit