A total solar eclipse will be visible across parts of the United States Aug. 21, treating amateur and professional astronomers alike to sights similar to this NASA’s Solar Dynamics Observatory ultraviolet image of the moon eclipsing the sun on Jan. 31, 2014.
If you've ever wondered why you can look at a solar eclipse and why it can harm your eyes, the answer is in the sun's rays.
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.
If harnessed properly, the sun holds tremendous potential to provide sustainable energy for the earth.
Solar energy is now powering much of the world.
New research shows it only takes a few countries to kick-start the kind of global transformation required to meet the Paris Agreement’s long-term goals.
A boy silhouetted against smog while playing cricket in Karachi, Pakistan, in 2011.
Massive new coal plants planned for Pakistan will further harm the environment in a country already suffering the effects of climate change. Solar energy is a clear alternative.
To manage renewable energy efficiently, all weather variation need to be taken into account.
Relying less on fossil fuels is one of the key challenges of energy transition, and taking weather variations into account can help increase the overall efficiency of a renewable-energy system.
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.
The rise of renewable energy is one reason the world is shifting away from coal.
Wind turbine image from www.shutterstock.com
Global emissions from fossil fuels have stalled. That puts us in the right place to keep warming below 2℃, but there's plenty of work still to be done.
South Africa’s new energy plan shows a greater reliance on gas, solar and especially wind power.
South Africa has a new energy plan. Renewable energy in the form of wind, gas and solar feature high on its agenda.
Solar jobs now outnumber coal jobs in U.S. Is that reason enough for government policies to promote clean energy?
Will government policy to promote clean energy be disastrous or a boon? A close look at the 2009 stimulus, which plowed $90 billion into energy, can tell us a lot.
Companies like Tesla, with batteries and electric cars, are disrupting traditional energy companies in Australia.
Energy companies shouldn't rely on government regulation to protect them from the growing disruption from renewables and increased consumer control.
High impact usage. Lightning strikes Toronto.
A place for everyone, and everyone in their place. A guide for how you can help build a sustainable energy future.
Solar panels on a Walmart roof, Mountain View, California.
Solar power has enormous potential, but provides only about one percent of world electricity today. An engineer explains the many steps it takes to make solar panels that are efficient, clean and cheap.
Low-carbon initiatives in cities like Rwanda’s Kigali can help citizens to deal with the harsh effects of climate change.
From an economic point of view, low-carbon plans in rapidly urbanising areas can have massive benefits for East African cities.
Titanium ore can be used to develop lithium ion batteries and supercapacitors, which can aid South Africa’s energy problems.
South Africa his rich in minerals that, combined with the development of nanotechnology, can be used to help it develop new energy technologies.
A solar array goes up in New York. Is this the best place to locate solar, given the relatively clean New York state grid?
The wind and solar industries scored a huge win by getting extended tax credits, but research shows this isn't the best policy for lowering emissions through renewable energy.
The Herbert solar plant in the Northern Cape, South Africa. The panels face the sun squarely and constantly.
Solar power is a key piece of South Africa's energy puzzle.
Ahmad Masood / Reuters
Strength in numbers matters in the world of solar energy.
South Africa has installed solar water heaters in low cost housing areas. It should be installing solar PV for energy.
South Africa has been slow to adopt renewable energy sources. One option, which has proved successful elsewhere, would be to install solar photovoltaic panels on rooftops in low-income areas.
Mozambique is seeking to use renewable energy to extend electricity access to rural institutions.
Mozambique has long standing energy challenges and widespread energy poverty. To change this, particularly for people living in rural areas, it needs to democratise the way it supplies energy.