As the holidays wind to a close and we ring in the new year, sit back and relax with your favorite libation and enjoy our most popular videos of the year. We guarantee you will learn something new.

In May of 2014, Speaker of the House John Boehner responded to a climate change question with, “listen, I’m not qualified to debate the science over climate change. I am astute to understand that every proposal that has come out of this administration to deal with climate change involves hurting our economy and killing American jobs. That can’t be the prescription for dealing with changes to our climate.” Speaker Boehner is not the only one reluctant to enter into the debate on climate change. In a March interview Mitch McConnell responded to a climate change remark with, “For everybody who thinks it's warming, I can find somebody who thinks it isn't…”

In June, the U.S. Environmental Protection Agency (EPA) proposed a rule to restrict the amount of carbon dioxide released from power plants. The rule calls for reducing carbon 30 percent by 2030 over 2005 levels. Many have praised the aggressive proposal, while others are less favorable.

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

A 2013 report from the Bureau of Labor Statistics (BLS) found 3.4 million green jobs in the United States at the end of 2011. This is the latest data available from BLS, due to the elimination of its Green Careers program. On March 1, 2013, the across-the board spending cuts referred to as sequestration, required by the amended Balanced Budget and Emergency Deficit Control Act, came into effect. As part of those budget cuts, BLS stopped offering all “measuring green jobs” products.

As an industrial powerhouse and the world’s largest energy consumer, China is fortunate to have abundant coal and hydropower resources. However, to meet demand in the east and south of the country, planners continue to seek new ways to generate local energy. In addition, plans call for development that reduces the use of fossil fuels as a way to also reduce air pollution.

GDF Suez SA plans to double renewable power production capacity in Europe over the next decade as the utility shifts its focus away from developing more historic natural gas and nuclear energy sources in the region.

Spending on renewable energy, which surged 16 percent in 2014, will remain strong this year, largely unaffected by the slumping oil prices that have artificially depressed their shares.

President Obama has been under intense scrutiny for what he would do about climate change ever since he was elected in 2008. Part of that scrutiny takes place during his State of the Union Speech, when renewable energy proponents search for key words about solar and wind energy and count how often he mentions "climate change."

The Brazilian bank Itau Unibanco Holding SA raised 1.05 billion reais ($408 million) to finance renewable energy and water treatment projects.

Oil prices have fallen by more than half since July. Just five years ago, such a plunge in fossil fuels would have put the renewable-energy industry on bankruptcy watch. Today: Meh.

Researchers at Chalmers University of Technology have discovered that the insulation plastic used in high-voltage cables can withstand a 26 per cent higher voltage if nanometer-sized carbon balls are added. This could result in enormous efficiency gains in the power grids of the future, which are needed to achieve a sustainable energy system.

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.

Ending a year-long race that had been nip-and tuck every month, renewable energy sources cumulatively provided more new electric generating capacity in 2014 than did natural gas.

The recent dramatic plunge in oil and natural gas prices, to their lowest level since the global recession in 2009, has some observers worried about the effect on clean tech. Conventional wisdom has it that renewables have a tougher time competing when fossil fuels are cheap, making grid parity (in the case of natural gas-fired electricity) more elusive for solar and wind power.

In a previous article, I had a conversation with former-CIA chief Jim Woolsey to discuss one of America’s greatest national security vulnerabilities, its power grid. The issues that Woolsey has been concerned with for over a decade has been the ease in which a terrorist group or other actor (think North Korea for example) could attack the grid and plunge the country into darkness for months, if not years. And if that seems far-fetched, just recall how a tree limb fell in Ohio in 2003 and blacked out the entire Northeast and part of Canada for several days.

In a crammed Washington conference room last week, speaker after speaker seemed to apologize for their ‘broken record’ talking points as Bloomberg New Energy Finance and the Business Council for Sustainable Energy unveiled their annual Factbook. But, of course, they were only being honest — like 2013 before it, 2014 had been an unprecedented year for clean energy.

Last year the U.S. Environmental Protection Agency (EPA) proposed its aggressive Clean Power Plan (CPP), which calls to reduce carbon emissions 30 percent by 2030 over 2005 levels. States are required to submit reduction plans that can include increasing renewables, efficiency, and cap and trade programs by June 2016.

For many mining companies, the rallying cry for investigating solar or wind energy options has been that the price of oil and other conventional fuels is too high — and will almost certainly rise over time. Now, though, with oil prices having taken a dramatic nosedive, this argument no longer packs quite the same punch that it once did.

India said cheaper credit along with foreign investment will help the world’s third-largest polluter fund an ambitious renewable energy program that would build green power plants faster than China.

When I worked at the New York Attorney General's Office, we sued coal-fired power plants because their air pollution was making people sick. But in some towns, I saw that the reliance on coal really had people in a bind. The coal plant was making them sick, but it was also a major tax generator for the town. If the plant closed, the town might have to lay off teachers and cops, in addition to losing the plant jobs.

The renewable energy industry has come a long way in relatively little time. The costs of renewable technologies continue to go down, while renewable capacities at many utilities continue to go up. Although, in many cases, renewable technology is mature and ready for utility-scale deployment, state and federal production and investment tax policies appear less evolved.

Actress Natalie Portman, environmentalist Robert F. Kennedy, Jr., and other high-profile Harvard University alumni are calling for demonstrations to urge divestment from fossil fuels.

Technologies to harness wave and tidal power have been under development for over 40 years, but up until quite recently the center of technology development has been in Europe, where the resource intensity is greater than the United States’ coasts. However, in an effort to nurture the country’s sector, the U.S. Department of Energy’s Water Power Program has invested in a broad portfolio of technologies and Alison Labonte, DOE Marine and Hydrokinetic Technology Manager, revealed that it has recently increased its focus on “innovative, game changing technologies that utilize the most abundant marine resources and that have the greatest potential for achieving economic viability.”

Many businesses can now perform the traditional functions of an electric utility — provide affordable, reliable, resilient power to homes and businesses. The barriers to entry in the business have fallen. For instance, a home with rooftop solar panels, batteries, and gas-based generators may choose to be grid-independent. Even when homes decide to remain grid-tied, utilities face falling demand and revenue, and the possibility of future grid-defection. Further, competing electricity solutions can emerge quickly, and not one-home-at-a-time — microgrids can offer community, village, or campus-level solutions.

The annual outlook issue of Renewable Energy World magazine is our attempt to predict what will happen within the renewable energy industry over the course of the year. To do this, we went straight to the top of major renewable energy companies, asking CEOs and presidents to tell us where they are devoting their company resources in order to capitalize on some of the market growth that they expect to see in 2015.

In a must-read report released this week on fast-changing energy markets, the National Bank of Abu Dhabi signals a once-in-a-lifetime opening for investors in Middle Eastern renewables and energy efficiency.

Policies favoring clean energy and increased competition would normally dim prospects for existing producers. Not in Chile, where foreign investors are driving a renewable boom at a time of surging returns by local utilities.

Business leaders have an important decision to make this year: to continue operating under the status quo or to join the list of successful companies creating a more sustainable future by contracting or investing in renewable energy and making a positive impact on their brand, customers, employees and bottom line.

Sweden and Norway agreed to boost their target for renewable energy production amid concerns the additional capacity will exacerbate a power glut and strain the region’s electricity grid.

Sen. Troy Fraser (R-Horseshoe Bay) has filed a bill that would eliminate Texas’ Renewable Portfolio Standard (RPS) – a policy that has catapulted Texas to world leadership in wind energy and strengthened Texas’ energy diversity. In addition to terminating the RPS at the end of the year, SB 931would make it more difficult to build renewable energy infrastructure. The argument behind the bill is that because Texas has achieved its RPS goals it’s time to move on. Sounds reasonable, right? Well…

The U.K. company planning the world’s first tidal-lagoon power station said its next plant may generate electricity at almost half the price.

Ormat is a successful developer of geothermal energy projects. Two former employees have brought a lawsuit alleging that Ormat made inaccurate 1603 Cash Grant submissions to obtain grants for projects that should not have qualified for such grants.

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.

This week New York Governor Andrew M. Cuomo announced the signing of an agreement between the New York Power Authority (NYPA) and State University of New York Polytechnic Institute (SUNY Polytechnic) that aims “to create a world-class facility devoted to energy technology innovation and the rapid deployment of smart-grid technology to modernize New York's electric grid.”

Investors have spent more than $2 trillion on clean-energy plants in the past decade and last year added more renewable capacity than ever before.

Jim Keffer is Republican state lawmaker in Texas with a permit to carry a concealed weapon and doubts about whether human activity is causing global warming.

Researchers at Yale have unveiled a new interactive map that estimates public opinion on global warming right down to the county level.

In our second annual survey on American homeowners’ attitudes toward clean energy, one thing is resoundingly clear. In a nation divided on climate change, immigration policy, and so many other issues, Americans are overwhelmingly united in their support of renewable energy.

Global investment in clean energy slumped 15 percent in the first quarter to the lowest level in two years because of a decline in wind and utility-scale projects.

We've made great progress with renewable energy — but from an almost zero base we still have a long way to go. Fortunately, the path is clear. California is already over 12 percent with a combination of hydroelectric, wind and solar (unfortunately not much hydro this year). Getting to 50 percent only requires the deployment of existing technology. But can we get to 100 percent?

A report released recently by the International Energy Agency's Ocean Energy Systems shows that the marine and hydrokinetic sector moved closer to commercial viability through 2014.

A "dark horse" is defined as a little-known entity that emerges to prominence in the face of competition — a contestant that seems unlikely to succeed. I borrow the term from a conversation last week, wherein India was referred to as the dark horse in the global race to go solar.

The race for renewable energy has passed a turning point. The world is now adding more capacity for renewable power each year than coal, natural gas, and oil combined. And there's no going back.

Brazil will increase the use of renewable energy, target zero net deforestation and push for low-carbon agriculture as part of its climate proposal, Environment Minister Izabella Teixeira said in an interview.

Australia’s largest electricity producer committed to close its coal-fired power plants within 35 years as part of an effort to cut the nation’s dependence on the fossil fuel.

Last June, the Environmental Protection Agency (EPA) proposed the first ever national carbon pollution standards for existing power plants. Fossil fuel-fired power plants account for almost 40% of U.S. carbon dioxide emissions, making them the largest source of greenhouse gas emissions in the nation and one of the single largest categories of greenhouse gas sources in the world.

According to the latest "Energy Infrastructure Update" report from the Federal Energy Regulatory Commission's (FERC) Office of Energy Projects, wind, solar, geothermal, and hydropower combined provided over 75 percent (75.43 percent) of the 1,229 megawatts (MW) of new U.S. electrical generating capacity placed into service during the first quarter of 2015. The balance (302 MW) was provided by natural gas.

The Government of Egypt has said that it must invest US$12 billion in the electricity sector over the next five years in order to meet that country’s urgent electricity demands — and renewable energy will be a key component.