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.
Disase carrying insects are attracted to light bulbs – a constraint of domestic solar energy.
Solar is a vital piece of the energy puzzle for Africa, but there is an insect problem that comes with the light from solar.
A solar water heating unit on the roof of a home in Kuyasa outside Cape Town. South Africa has a long way to go to get people off the grid and onto solar heating.
Africa is blessed with an abundance of sunshine.Given the heavy demand for energy, alternatives, such as solar, could provide solutions and help stimulate economic growth.
Real hot: the Ivanpah solar power plant and others like it use mirrors to produce heat to make steam and drive an electricity turbine.
The massive Ivanpah solar power plant uses natural gas – even more than it expected last year. It's not ideal, but solar power and natural gas are a powerful, and relatively 'green,' combination.
Solar energy is key to development in African countires.
Integrated research is key to sustainable development, which helps Africa resolve its energy woes.
Low carbon choices such as solar power are essential for the African continent, if it intends to stop the harmful global warming effects.
For the sake of mitigating climate change, the African continent needs to make low carbon energy choices.
Access to the grid has crowded out solar in some places in India.
DFID - UK Department for International Development/Flickr
Given existing technologies, expanding access to electricity almost always increases CO2 emissions. There are real trade-offs between addressing poverty and climate change.
Will alternate solar technologies get a boost if solar overall grows?
Hillary Clinton's renewable energy plan is ambitious but, on a technical level, doable. Would it foster more solar technology innovation?
Employers have a duty to keep their employees safe from the sun.
A real-time hand-held device can help employers measure the impact of the sun on workers.
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.
The future of space travel?
A prototype solar sailing satellite has just successfully been deployed in orbit, pointing the way to the future of space travel.
The Tesla Model S - mean, and green?
The Tesla Model S is only as green as its electricity source - which is not very in brown-coal powered Victoria.
A tandem solar cell made from silicon and metal-halide perovskite.
A hybrid approach to solar – using reliable silicon and new inexpensive material perovskite – shows promise for low-cost, efficient solar cells.