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Sapphire Energy, which converts algae into synthetic crude oil, raised $144 million in one of the biggest clean tech deals in the past 12 months.

Two U.S. clean tech companies have gone public as the industry hopes high energy prices and better technology will make investors forget the sector's recent struggles.

German parliament approved cuts in aid to solar power and Italy reconsiders its renewable energy subsidies.

Massachusetts utility NStar has agreed to buy power from the Cape Wind offshore wind farm for more than double the projected cost of electricity from conventional sources.

A global index developed by research firm Cleantech Group reveals that Denmark has created a home where clean tech companies are most likely to thrive, ahead of such places as the U.S., Israel and Germany....

In a case of corporate espionage, China's Sinovel Wind Group Co. was discovered to be running a stolen version of American Superconductor Corp.'s software.

The commission says it needs to invest $4 billion a year and currently only invests half that amount.

$16 billion in loans authorized by Congress for fuel-efficient vehicles has not yet been distributed and some applicants are blaming solar panel company Solyndra for the delay and/or withdrawing their...

Siemens was given a $1.6 million research grant from the U.S. Department of Energy to research ways to cut the cost of electrical vehicle chargers.

Primus, a N.J. based renewable gas developer, received a $12mm investment from Israeli based IC Green Energy Ltd., and expects to raise up to $100mm this year.