Elliot Berman with his team at Solar Power Corporation outside their office and manufacturing facility in Braintree, Mass., in 1973. John Perlin, author of Let it Shine: The 6,000-Year Story of Solar Energy, credits Berman with planting the flag of solar photovoltaics throughout the world.
Solar Power Corporation via John Perlin
Jason Carney designed and installed the solar array on the roof of his house in Nashville, Tenn. He wants to introduce more people in minority communities to the advantages of solar energy.
Tamara Reynolds for NPR
Container ships and other maritime vessels currently run on pollutant-intensive heavy fuel oil. The world's largest container-shipping company, Maersk, has promised to make its operations zero carbon by 2050. Doing so will require using new fuels such as hydrogen.
John Greim/LightRocket via Getty Images
The Danish company Maersk has been shipping goods around the world since the age of steamships. Now it wants to usher in a new era, with carbon neutral transport.
David Hecker/Getty Images
An aerial view of the 52-megawatt solar farm built by Silicon Ranch in Hazlehurst, Ga. Ever cheaper and better solar technology, available land and lots of sunshine are driving demand for massive, utility-scale solar projects across the American Southeast.