Transportation is the biggest contributor to greenhouse gases by sector. Converting the U.S. fleet to cleaner electric vehicles would likely take decades.
AP Photo/Ross D. Franklin
What if the world really got serious about meeting global climate goals? Doing the math on current emissions and the pace of energy transitions shows how quickly fossil fuels need to be phased out.
Coal power has long been a mainstay of the electricity system but has lost share as natural gas prices have gone down.
The Department of Energy's review of the electricity grid finds natural gas, rather than renewables, has hurt coal and nuclear power. But that's only half the story of the changes underway.
Yallourn Power Station in the Latrobe Valley, Victoria.
AAP Image/David Crosling
On Q&A, an audience member said renewable energy is 'now cheaper than coal'. Senator Matt Canavan disagreed, saying renewables are not 'at the moment, cheaper than coal'. Let's look at the numbers.
As more wind turbines have been put in place, the cost of wind energy has gone down.
Dad of T&S
If history is a guide, policies that promote wind power expansion will lead to lower prices – potentially beating fossil fuels in the US by 2030.
You may agree the U.S. should move to renewables, but how quickly can we do it and how?
How fast can the US transition to clean energy and with what energy sources? Here's why an impassioned debate among energy wonks matters to the rest of us.
Lessons from the Lone Star State: A surge in wind power on the Texas grid didn’t cause reliability problems (and brought down electricity prices) because regulators improved the efficiency of wholesale electricity markets.
Sarah Fields Photography/Shutterstock.com
Energy Secretary Rick Perry wants to know if wind and solar are compromising the reliability of the grid and hurting coal power. The answer lies in his home state of Texas.
Wind turbines require massive structures that are polluting to produce and can harm ecosystems, but these impacts compare favorably with those of fossil alternatives.
No energy source is perfect, but solar and wind have a much lower health and environmental footprint than fossil fuels, a study finds. Biopower, though, is a mixed bag.
Domestic energy production, both fossil fuels and renewables, has surged in the past decade, yet policy priorities haven’t.
Presidential candidates need to talk more about energy and address a tough question: what does the government do well on energy policy and what it should stay out of?
The Diablo Canyon nuclear power plant in California is closing and the state has committed to replacing it with greenhouse-free sources of electricity.
Can nuclear power plants like California Diablo Canyon be replaced without greatly raising emissions? It's an open question.
Americans like big vehicles – a serious challenge to reducing emissions.
American consumers just aren't prioritizing fuel efficiency in a time of low gasoline prices. Is there a way to reverse the trend and make progress on climate change?
The U.S. oil industry is in the doldrums, but there’s not much the next (or current) president can do about it.
The next president will have little power to slow the growth of renewable energy, sliding oil prices or coal's decline.
Supreme Court ruling allows consumers and businesses to make money by reducing power and other grid services.
An obscure Supreme Court ruling paves the way for people and businesses to earn money with distributed energy technologies.
A solar-powered microgrid in India.
Abbie Trayler-Smith / Panos Pictures / UK Department for International Development
Developing countries need technical and financial aid to begin the transition to low-carbon energy now, not just pledges to invest in energy R&D with payoffs decades from now.
‘Decarbonizing’ the energy system is above all an infrastructure problem.
Dealing with climate change will require countries to 'decarbonize' their energy infrastructure. The history of infrastructure suggests this could happen quickly once the transition starts.
The Supreme Court will decide a case that will have a big effect on distributed energy technology, including batteries.
The Supreme Court hears a case that will decide whether homes and businesses can earn money from distributed energy technologies, including demand response and home battery systems.
Lots of wind blowing – often at night when there’s little demand for power.
Smoothing out variable wind and solar is a growing problem. Instead of storing energy with batteries, utilities can adjust the power of millions of devices in buildings and homes.
Time for something new in the battery department.
Everyone wants a better battery for longer run-time on electronics and driving range for EVs. What's the most likely successor to today's lithium-ion batteries?
Ready for more?
Department of Energy
Five years after the Deepwater Horizon oil spill, the Obama administration is looking to expand offshore drilling. Is it any safer today?
wave via www.shutterstock.com
Research project combines digital technologies with farms of wave generators to bring plentiful and reliable ocean power closer to commercialization.
The massive Ivanpah Solar Power Facility in California was partially funded by a large Department of Energy loan guarantee yet the policy has been harshly criticized.
The world needs new energy technologies to meet global demand and slow emissions. Government plays an outside role in energy so what policies work best for innovation?