Award-winning US chefs visited Washington this week to urge politicians to tackle America’s $200bn food waste problem
Senators are scrambling to rescue the wide-ranging energy bill, as President Obama unveils new fuel tax and green transportation plan
Industry and analysts predict massive wave of new investment will be unleashed after Congress approves multi-year extension for crucial tax breaks
Even as more companies work to reduce emissions and use renewables, they haven't demanded action in Washington
Did Pontiff soften language on climate change for Republican-dominated audience?
Pope Francis welcomes Obama's Clean Power Plan, arguing 'climate change is a problem which can no longer be left to a future generation'
Republicans open up new fronts in attempt to stop the Environmental Protection Agency regulating greenhouse gas emissions
Senate votes overwhelmingly that climate change is real, but GOP Senators line up to reject scientists' warnings that humans are a cause
President uses State of the Union to warn that he will not let Congress turn back the clock on climate action
Reports suggest president Obama is preparing to make climate action a centrepiece of his State of the Union address, but Republicans remain deeply opposed to White House agenda
Controversial bill supporting project will be debated in the Senate after winning House approval, but President is expected to veto it
A Republican-controlled Congress spells bad news for the green economy and UN climate change talks, but will it prove as disastrous as some environmentalists fear
President says members of congress are feigning ignorance of science because they fear backlash from 'fringe elements'
The Lorax, steroids, and Congressional climate denial – Could Democrat all-nighter revive US climate action?
Senators promise that all night debate on climate change will be followed by renewed push to eventually deliver Congressional action
Republicans reject calls for tougher chemical regulations, despite latest toxic spill
EPA asserted authority to move forward without new laws from Congress at hearing where contrarian views were on display
Representatives approve bill declaring that controversial oil pipeline from Canada does not need president's permission
MIT physicist replaces Steven Chu with unanimous Senate backing
NRDC estimates $100bn was needed to deal with the aftermath of droughts, floods and fires in 2012, representing the biggest non-defence spend in the US budget
Climate Declaration secures 40th corporate signatory, as auto giant calls on Washington to deliver ambitious environmental policy
Campaign group aims to increase pressure on Republican climate deniers blocking Congressional action on emissions
Watered down bill aims to navigate Congressional barriers
Proposal to target most polluting facilities in America would raise $1.2trn, 60 per cent of which would be returned to bill payers
Senators Barbara Boxer and Bernie Sanders slated to unveil comprehensive climate change legislation following Presidential ultimatum