Energy & Green Tech

Study shows plug-in hybrids polluting far more than expected

Plug-in hybrids have enjoyed a surge in popularity, but a study published Thursday showed they are polluting far more than most buyers think because they rely on batteries less often than regulators expected.

Engineering

A 'raincoat' protects lead-free solar cells from the elements

One drawback of most solar cells made with efficiency-boosting perovskite is the presence of hazardous lead in the materials that turn sunlight into electricity. Next-generation solar cells made with the most promising lead-free ...

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