Pilot project in Arizona promises to charge batteries in less than 15 minutes
New study claims US alone has 6,000 square miles of carbon-soaking rocks capable of capturing 500 years' worth of US carbon emissions
Having signalled his support for biofuels, Obama now faces calls to increase amount of ethanol that can be blended with conventional fuels
Study claims deposit schemes in Europe and US have help cut litter levels 80 per cent
From religious concerns over biofuels to investor fears over clean tech, BusinessGreen.com runs down the week's top stories
Climate minister says Obama's commitment to environment has raised prospects of global agreement at UN summit in December
UK must move fast to take advantage of global race to become a green technology hub, says prime minister
New budget earmarks extra money for wind, solar, nuclear and clean coal technologies