The EU's top court, the European Court of Justice, warned Friday the bloc's legal order could unravel if national courts started to question the primacy of EU law and ECJ decisions. In an unprecedented statement, after the German Constitutional Court's ruling on the European Central Bank diverging from an earlier ECJ decision, the ECJ said it alone has the right to rule on EU institutions and interpret EU law.

70 years later, after decades of comparative peace, todays European Union - perhaps the world's greatest experiment in state integration - finds itself at a crossroads.

The European Union will review German discounts on environmental taxes amid concerns the aid to companies that consume high volumes of energy may be illegal, but newly re-elected Chancellor Angela Merkel warned the measures are needed to keep Europe's biggest economy competitive.

A Louisiana lumber town has become the crossroads for an unusual buyer and seller in the U.S. municipal market: private-equity firm KKR & Co. and the world’s biggest manufacturer of wood pellets.

The United States broke one record after another for extreme weather in 2013. From deadly floods in Colorado to prolonged drought across the Southwest, Americans saw what unchecked climate change can do to our communities. But we also witnessed another kind of powerful force: real and positive climate action.

Prime Minister David Cameron urged the European Commission to reject calls for a renewable energy target, saying such a plan may cost U.K. consumers 9 billion pounds ($14.8 billion) a year by 2030.

The European Union is poised to take its first formal steps to expand the world’s most ambitious limits on fossil fuel pollution. That may widen a rift in how it balances green policies with the need for cheaper power.

Wind and solar power producers say they're at risk of losing investment after the European Union's executive arm scrapped proposals for a mandatory target on renewable energy use in 2030.

Renewable energy companies will derive more of their funding from bond markets as banks curb lending to the industry, Citigroup Inc.’s head of environmental finance said.

AlgaEnergy SA, part-owned by Spain’s Iberdrola SA and Repsol SA, is in talks with potential partners to set up a plant in Mexico to supply the American markets with biomass made from algae.

The European Union should ensure that future climate and energy policies do not undermine the competitiveness of its industry, already weakened by a price gap with the U.S., the bloc’s member states said.

The latest hydroelectric power news and information for March 2014

Talks between Germany and Norway about how to boost the trading of electricity from renewable sources are being held up by concerns that the power cable running under the North Sea won’t ever make money.

Royal DSM NV, the world’s largest vitamin manufacturer, expects to begin producing cellulosic ethanol in the U.S. by July as the government considers reducing the amount of renewable fuel that oil companies will be required to buy.

Prime Minister Shinzo Abe is pushing Japan’s coal industry to expand sales at home and abroad, undermining hopes among environmentalists that he’d use the Fukushima nuclear accident to switch the nation to renewables.

The world needs to triple the energy it gets from renewables, nuclear reactors and power plants that use emissions-capture technology to avoid dangerous levels of global warming, United Nations scientists said.

What’s a beleaguered utility to do when forced by the government to close its profitable nuclear power plants?

Clean energy investment rose by 9 percent in the first quarter from a year earlier on surging demand for rooftop solar panels from the U.S. to Japan.

Germany’s biggest utilities face dwindling market shares as the shift to renewable energy spurs regional power generation and storage technology, a senior member of Chancellor Angela Merkel’s party said.

Collection of articles related to hydropower technology from April 2014

Drax Group Plc, Dong Energy A/S and SSE Plc will get guaranteed power prices for U.K. biomass and offshore wind plants, the first renewable energy projects to benefit from a new aid program.

The Obama administration is considering cutting greenhouse-gas emissions from power plants by reaching beyond the plants themselves — an unusual approach that could run afoul of anti-pollution laws.

Bracing for greenhouse-gas rules from the Obama administration, two industries are staking out different positions. Coal companies are pledging to sue. Electric utilities are ready to talk.

Vestas Wind Systems A/S said scaling back Australia’s renewable energy target would cut the value of more than A$10 billion ($9.4 billion) in large projects across the industry and discourage international investors.

Billionaire Rubens Ometto’s Cosan SA has the potential to triple its power generation by burning sugar-cane leftovers if the government offers power-purchase contracts for biomass producers.

The latest news on global small hydroelectric facilities from July-August 2014

The European Union threatened to renew tariffs on biodiesel from the U.S. for another five years in a sign of persistent trade tensions over renewable energy.

The top hydroelectric power news for July 2014

In the arid Imperial Valley of California, Tim Brummels is trying to turn an agricultural cousin of sugarcane into low-carbon ethanol.

India will begin construction this year on an $8 billion project backed by Germany’s development bank to upgrade its grid to handle a more than doubling of renewable power capacity by 2022.

California and Quebec, which together created the largest carbon market in North America this year, may come away empty-handed as they woo northeastern U.S. states to join their system.

Europe’s concern about its reliance on Russian fossil fuels may spur governments to prioritize alternative energy, the head of Neste Oil Oyj said.

European Union governments are considering the use of carbon-permit funds to help finance clean technologies and spur poorer nations toward a low-carbon economy under a planned deal on 2030 climate and energy policies.

German electricity consumers will for the first time see a drop in the fee added to their bills to fund renewables, a boost for Chancellor Angela Merkel, who has pledged to curb the cost for voters.

Brazil, known as a leader in the bioenergy scene, continues to show its dominance in the industry with plans for a new cellulosic ethanol plant and a 150-MW woody biomass plant, the nation's largest.

Humans are causing irreversible damage to the planet from burning fossil fuels, the biggest ever study of the available science concluded in a report designed to spur the fight against climate change.

President Barack Obama pledged deeper U.S. cuts in greenhouse-gas emissions and China will for the first time set a target for capping carbon emissions under an agreement between the world’s two biggest economies.

President Barack Obama will pledge $3 billion to a United Nations climate-change fund that’s intended to help poor nations boost renewable energy and counter the ill effects of global warming.

EON SE’s plan to spin off its fossil fuel plants marks a watershed moment in Germany’s renewables effort that will likely bolster the country’s already leading position in clean energy.

Warren Buffett wants to tell you the best time to wash your clothes. Or at least his energy company in the U.K does. Buffett’s Northern Powergrid Holdings Co. is working with Siemens AG to test a so-called smart grid that has the ability to control when consumer appliances will be used in the home.

The top hydroelectric power news for December 2014

Learn how Canadian utility SaskPower integrated its hydro and non-hydro generating assets under one management system using Hatch's Vista Decision Support System.

California Governor Jerry Brown proposed spending $59 billion to fix crumbling roads and raising the state’s renewable energy mandate to 50 percent.

Germany’s utilities, battered by the country’s shift to wind turbines and solar panels, would be glad to sell you a power plant on the cheap. They’ll even pack it up and ship it to another country.

The Obama administration is proposing a $4 billion fund to reward states that exceed cuts in greenhouse-gas emissions, and wants Congress to back steeper royalty rates for oil, gas and coal extraction from public land.

For a lesson in global energy history, look no further than Stockholm’s oldest power plant. Since 1903, Fortum Oyj’s Vaerta harbor site has generated power using coal, oil, natural gas and even considered nuclear. Now it’s phasing out the last coal furnace and replacing it with the world’s largest combined heat and power generator that will burn just wood chips and timber scraps by next year.

U.K. subsidies for RWE AG’s Lynemouth power plant face a European Union probe amid concerns government aid would give the company too much to convert the site from coal to biomass and may hamper competition.

President Barack Obama ordered the federal government to reduce greenhouse gas emissions by 40 percent from 2008 levels over the next 10 years by shifting to renewable energy sources such as solar power.

Beijing, where pollution averaged more than twice China’s national standard last year, will close the last of its four major coal-fired power plants next year.

U.K. electricity from low-carbon sources accounted for almost a quarter of the country’s generation in the fourth quarter as Drax Group Plc converted a second coal-power plant to burn wood.