Green New Deal campaign group says £50bn should be spent on technology, cheap housing and insulating homes

Exposure to emissions would be fatal within hours, say Japanese authorities, as race to build frozen wall begins

Prime minister Shinzo Abe makes pledge amid growing concern at scale and complexity of operation

Operator of Japanese nuclear power plant claims there has been no leak but has yet to discover cause of radiation spike

Oil company and US state embroiled in war of words over cleanup operations after 2010 Deepwater Horizon disaster

Successful bid by Citizen Energy Berlin for Vattenfall network will boost renewables and plough back profits, says activists' group

Business leaders claim there is no business case for the line linking London with Birmingham, Manchester and Leeds

Campaigners accuse Defra of covering up pollution figures as it plans to close up to 600 stations in England to save money

Report issues 69 policy recommendations in anticipation of more extreme weather conditions in an age of climate change

Rise in number of plants burning waste may be disincentive to greener methods of disposal