Plus, more on the Tianjin explosions, China previews Xi's trip to DC, and the world's biggest solar plant. China links.

Renewable energy could improve the quality of China’s air, and its international image.

Pakistan faces a severe energy crisis. Renewables such as solar energy represent a solution.

Progress over climate change depends largely on the actions individual major carbon emitters, particularly China – not U.N. summits. But is the political courage there to exact change?