Clean energy could lead to scarce materials

As the world moves toward greater use of low-carbon and zero-carbon energy sources, a possible bottleneck looms, according to a new MIT study: the supply of certain metals needed for key clean-energy technologies.

Philippine solar light bottles offer hope

Filipino entrepreneur Illac Diaz is aiming to help a million poor people in a year, and with the help of some plastic bottles and a clever social media campaign may do even better.

UN floats plan to boost renewables as climate worries mount

The United Nations chief on Wednesday launched a five-point plan to jump-start broader use of renewable energies, hoping to revive world attention on climate change as the U.N.'s weather agency said greenhouse gas concentrations, ...

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