USA

Department of Energy makes $30m available for companies developing viable diesel and jet fuel substitutes

Watchdog states new permitting rules will only apply to facilities producing more than 100,000 tons a year of carbon emissions

Companies announce plans for second major solar project, in the form of 20MW Nevada solar farm

Stricter soot standards proposed for heavy industry, drawing fire from pro-pollution Republicans

US banking giant announces new 10-year environmental business programme, promising investments to help tackle climate change and resource depletion

New report finds China is now largest clean tech market after sales grew by €13bn last year

Commerce Department mulls decision on whether to impose additional import tariffs on Chinese solar panels

Confidential memo seen by Guardian calls for climate change sceptics to turn American public against solar and wind power

Trade mission to take in Houston, San Antonio, and Atlanta in search of green business opportunities

Participants claim clean energy education and empowerment initiative risks failure unless it is core part of global summit