As editors we delight in learning which of the stories that we wrote or commissioned were most popular with our readers. That’s why at the end of each calendar year, we pull reports that tell us which stories we posted got the most shares, the most views, the most comments, etc. We also look at which videos were watched the most. Often, we post articles that we know will be a big hit: like explanations of controversial solar legislation. But other times you surprise us, readers, by taking great interest in articles that we felt were solid but not necessarily ground-breaking.

Here at RenewableEnergyWorld.com, we pride ourselves on our active community of readers who click, share, and comment on the articles that we post every day. While we don’t always agree with their take on the pieces we post, we always value constructive feedback and the high quality discussion that sometimes ensues.

After being shut out of previous renewable energy auctions, and delaying its own auction by two weeks, the state government of Pernambuco held the nation's first solar energy auction on December 27, registering 122.82 MW of energy, six times the country's current entire solar energy output (20 MW). The auction involved 34 bidders proposing roughly 1 GW of capacity; at the end it was narrowed to six companies from Brazil, Italy, Germany, China and Spain. Average price of power finished trading at 228.63 Brazilian reais/MWh (just under U.S. $97), about 9 percent lower than the starting price of R 250.

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.

We here at RenewableEnergyWorld.com value each and every one of our excellent contributors that share their important and thought-provoking insights with our readers. But we have a special affinity for our outstanding blogging community.

PensionDanmark A/S and other Danish pension investors backed a state fund to finance emission-reduction projects in developing countries as the Scandinavian nation seeks to export its climate know-how abroad.

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.

European Union governments and the bloc’s executive arm are splitting over how to guarantee electricity supply as the region builds more renewable power.

European Union leaders intend next month to agree on a timeline for developing energy and climate targets for 2030, delaying a final decision on the polices, according to two people with knowledge of the matter.

Iceland and Japan, two nations rich with underground sources of renewable energy, can tackle climate change together by promoting the use of geothermal power, Iceland’s environment minister said.

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.

Clean energy assets in the Middle East and North Africa will more than double in capacity by the end of next year, the Dii GmbH industry association said.

Reykjavik Geothermal, the Icelandic power-plant builder, plans to begin drilling in Ethiopia by July as part of a $2 billion project to develop the renewable energy source, Chief Operating Officer Gunnar Orn Gunnarsson said.

The U.K. risks power shortages because utilities may react to Europe’s toughest carbon emissions rules by closing plants without replacing them.

U.K. renewable power generation rose 28 percent last year as more wind farms and solar plants came online, the Department of Energy and Climate Change said.

Three G-20 nations saw an increase in clean-energy investments last year even as funding declined globally for the second consecutive year, according to The Pew Charitable Trusts.

Prime Minister Shinzo Abe’s government stopped short of setting goals for renewable energy in the final version of a draft plan that reinforces atomic power’s role in Japan’s energy future, calling it a vital source of generation.

Technology is catching up with Thomas Edison’s electricity industry, eating away at the utility business model that hasn’t changed much in a century.

Simplifying finance vehicles for renewable energy will lure more investors and lower the costs of capital.

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.

Research reports and study findings related to hydropower from April 2014

General Electric Co. is in talks to buy Alstom SA, the French builder of trains and power plants, people with knowledge of the matter said, in what would be GE’s biggest acquisition ever.

Africa’s renewable energy capacity is expected to quadruple to about 120 gigawatts by 2030 if investors dedicate “substantial flows” of funds to the region, the InternationalRenewable Energy Agency said.

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.

The top hydroelectric power news for May 2014

IHI Corp., a maker of everything from aircraft jet engines to gas turbines, expects the market for small-scale geothermal projects to take off in Japan as the country seeks cleaner sources of energy.

U.S. President Barack Obama says natural gas can be a bridge from coal to a cleaner energy future. Investors are showing it’s more likely a bridge to nowhere.

Iceland is moving closer to plugging European homes into the volcanic island nation’s geothermal and hydropower reserves via what would be the world’s longest power cable, according to the country’s largest energy producer.

Japan said the U.S.’s proposed cuts in greenhouse-gas emissions from its power plants is a bold step to tackle climate change.

The United Kingdom is known for its pioneering work in wave, tidal and ocean current energy. The U.S. and Canada have vast marine resources and would benefit from partnerships with UK companies in a number of ways, including building expertise, sharing lessons learned and fostering industry growth.

A first-of-its-kind study of net evaporation at a hydroelectric facility reveals that the project has very little effect on the loss of water to the atmosphere as compared with pre-impoundment conditions.

The European Union needs an ambitious emissions-reduction goal, targets for energy- efficiency and renewables as well as tools to foster investment under its planned 2030 policies, an advisory panel to 14 ministers said.

Caisse des Depots et Consignations, a French state bank, is setting aside 5 billion euros ($6.8 billion) for green projects after the government proposed a law to spur use of renewable electricity and boost efficiency.

U.S. Export-Import Bank Chairman Fred Hochberg mounted a defense of the 80-year-old agency as Republicans weigh eliminating the lender they say backs major corporations with political connections.

Renewable energy may reap as much as two-thirds of the $7.7 trillion in investment forecast for building new power plants by 2030 as declining costs make it more competitive with fossil fuels.

Shinsei Bank Ltd., a lender for Goldman Sachs Group Inc.’s clean-energy projects in Japan, plans to provide as much as 200 billion yen (US $2 billion) in loans for renewable developments.

To help ensure the safety of fish passing through the new turbines at 912-MW Priest Rapids, Public Utility District No. 2 of Grant County is employing the BioPA method to analyze the biological performance of proposed designs - and to choose an improved one for this facility.

Orix Corp., a Tokyo-based finance and leasing company, plans to build as many as 15 geothermal power stations in Japan in the next five years.

France’s planned energy law will mobilize about €10 billion (US $13.4 billion) in investment through tax credits and low-interest loans to spur efficiency and renewable power, Environment Minister Segolene Royal said.

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.

Australia is frightening developers away from renewable energy even before the government decides whether to overhaul targets for the industry’s growth.

South African Energy Minister Tina Joemat-Pettersson said her department wants to address weaknesses in the process of commissioning renewable-power projects.