Energy & Green Tech

Why we should use electric rather than hydrogen cars

Last night's Federal Budget did not have any promising signals for encouraging uptake of electric vehicles, or to increase spending on installing the essential infrastructure needed to allay fears that motorists won't be ...

Energy & Green Tech

Study shows renewable energy will enhance power grid's resilience

A new Dartmouth Engineering study shows that integrating renewable energy into the American Electric Power System (AEPS) would enhance the grid's resilience, meaning a highly resilient and decarbonized energy system is possible. ...

Energy & Green Tech

Renewable energy powers ahead in 2020: report

Renewable energy grew at its fastest rate in two decades, driven primarily by gains in China and wind power, the International Energy Agency said in a report Tuesday.

Energy & Green Tech

Empowering citizens for successful energy transitions

The terms "co-creation" and "co-production," which denote the possibility for laypeople to participate in decision-making processes that affect their lives, have been gaining popularity. A new IIASA-led study explored options ...

Energy & Green Tech

Biden plan for cleaner power system faces daunting obstacles

If the nation is to meet President Joe Biden's goal of cutting America's greenhouse gas emissions in half by the end of the decade, it will have to undertake a vast transformation toward renewable energy.

Energy & Green Tech

Vertical turbines could be the future for wind farms

The now-familiar sight of traditional propeller wind turbines could be replaced in the future with wind farms containing more compact and efficient vertical turbines. New research from Oxford Brookes University has found ...

Energy & Green Tech

Experts' predictions for future wind energy costs drop significantly

Technology and commercial advancements are expected to continue to drive down the cost of wind energy, according to a survey led by Lawrence Berkeley National Laboratory (Berkeley Lab) of the world's foremost wind power experts. ...

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Renewable energy

Renewable energy is energy generated from natural resources—such as sunlight, wind, rain, tides, and geothermal heat—which are renewable (naturally replenished). In 2006, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, such as wood-burning. Hydroelectricity was the next largest renewable source, providing 3% of global energy consumption and 15% of global electricity generation.

Wind power is growing at the rate of 30 percent annually, with a worldwide installed capacity of 121,000 megawatts (MW) in 2008, and is widely used in European countries and the United States. The annual manufacturing output of the photovoltaics industry reached 6,900 MW in 2008, and photovoltaic (PV) power stations are popular in Germany and Spain. Solar thermal power stations operate in the USA and Spain, and the largest of these is the 354 MW SEGS power plant in the Mojave Desert. The world's largest geothermal power installation is The Geysers in California, with a rated capacity of 750 MW. Brazil has one of the largest renewable energy programs in the world, involving production of ethanol fuel from sugar cane, and ethanol now provides 18 percent of the country's automotive fuel. Ethanol fuel is also widely available in the USA. While most renewable energy projects and production is large-scale, renewable technologies are also suited to small off-grid applications, sometimes in rural and remote areas, where energy is often crucial in human development. Kenya has the world's highest household solar ownership rate with roughly 30,000 small (20–100 watt) solar power systems sold per year.

Some renewable energy technologies are criticised for being intermittent or unsightly, yet the renewable energy market continues to grow. Climate change concerns coupled with high oil prices, peak oil and increasing government support are driving increasing renewable energy legislation, incentives and commercialization. New government spending, regulation, and policies should help the industry weather the 2009 economic crisis better than many other sectors.

This text uses material from Wikipedia, licensed under CC BY-SA