Federal subsidies for renewable energy in the US are set to collapse unless there is a change in policy, according to a new analysis from researchers at three think-tanks.

Solar panels prices have kept marching lower this year, extending steep declines seen in 2011 and keeping pressure on hard-hit manufacturers who have struggled to eke out profits, industry experts said.

Italy is to cut the tariff it pays to solar energy installations by 35% on average, according to decrees approved by the industry and environment ministries.

Italy will scale back financial incentives for solar and other renewable energy that have inflated consumer power bills more than expected, and also will raise national renewable energy targets for 2020, two ministers said on Wednesday.

New York City has tripled its production of solar power by completing the installation of panels on 10 city-owned buildings, Mayor Michael Bloomberg said Monday.

Denmark has announced that by the end of this decade, it will produce a third of its energy from renewable sources - wind power, in particular, but also solar power and the burning of "biomass."

In remote parts of the vast state of Western Australia, photovoltaics are about to get more attractive for businesses and households.

Butterfly wings are not just beautiful. They are also sophisticated collectors of solar energy that help butterflies stay warm, and researchers say that their shinglelike structure could provide valuable clues into developing better solar technology.

Quickly running out of money, solar-project developer Solar Trust of America LLC filed for bankruptcy before it could finish a multibillion-dollar solar plant in California that was planned to generate electricity as one of the world's largest solar-power projects.

Shares of Q-Cells SE declined around 33% on Frankfurt's Xetra after the German weekly magazine Manager Magazin reported that the German solar cells maker may file for insolvency this week.

Japan's new feed-in tariff, implementation is anticipated to be July, is set to generate highly attractive returns, according to clean energy market research provider, Bloomberg Energy Finance.

Germany's parliament approved record cuts in aid for solar power, aiming to reduce the annual pace of installations by half in the world's biggest market for the industry.

A team from Massachusetts Institute of Technology (MIT) have developed a 3D solar module structure that can generate up to twenty times the electricity from a given area compared to normal solar panel layout.

President Obama traveled here to the Nevada desert Wednesday to highlight the future of solar energy - and ridicule Republicans for trimming back federal funding to develop it.