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British Prime Minister voices fears that getting major economies to deliver on $100bn climate finance pledge to vulnerable nations will be 'tough' going

Deal with ViriCiti aims to strengthen fleet management services for growing number of companies switching to electric vehicles

The Royal College of Physicians is joining a growing number of UK health organisations that are divesting from fossil fuel companies

Campaign group says action to ground flights at airport is proportionate to climate threat, as Heathrow says activists will face 'full force of the law'

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New York mayor announces sweeping climate change programme, while Washington's power will be carbon-neutral by 2030

State Governor Andrew Cuomo sets out 2019 agenda targeting a doubling of solar capacity by 2025 and a quadrupling of offshore wind capacity by 2035

City authorities could shift billions of dollars from fossil fuel funds in latest victory for divestment movement

New York State Governor sets agenda for 2018 and beyond, including raft of investment pledges on renewables, energy storage and carbon trading

In a major coup for divestment campaigners, state governor Andrew Cuomo and NYC comptroller Scott Stringer set out plans to halt pension investments into fossil fuels