But turning the newest breakthrough at a U.S. Energy Department lab into abundant, carbon-free power may require hundreds of billions of dollars. And many technical hurdles await.
Africa's surface area has 40% of the world's potential solar resources, but it houses just 1% of global solar capacity for generating electricity. With the right investment, Africa can become a renewable energy superpower.
The U.S. Department of Energy is giving $2.2 million in 11 grants to small businesses in Pennsylvania to support research into areas including turbines, thermal energy storage and nuclear energy.
