President Barack Obama's climate change policy is in crisis amid a barrage of US lawsuits challenging goverment directives and the defection of major corporate backers for his ambitious green programmes.
The legal challenges and splits in the US climate consensus follow revelations of major flaws in the UN Intergovernmental Panel on Climate Change (IPCC) report, which declared that global warming was no longer scientifically contestable.
Critics of America's Environmental Protection Agency (EPA) are now mounting a series of legal challenges to its so-called "endangerment finding" that greenhouse gases are a threat to human health.