Solar energy is often praised for being cleaner and more sustainable than other power sources. For example, fossil fuels are finite, their sources are depleting, and they cause air pollution.

With the right technology, solar energy has the potential to meet all of the world's electricity needs, but we are still a long way off from that point. Still, governments around the world are setting ...

Singapore is a city-state with large economic activity, large energy use and large population density (8,000 people per km 2). Only about 10% of Singapore’s energy needs could be met by local solar.