This article describes an inorganic solar cell prototype utilizing two types of cadmium nanocrystals. Do we really need to aim toward mass-producing more items that contain cadmium? This heavy metal is a toxin and carcinogen that is known for fast uptake in plants and buildup in animals’ fat. Risks associated with such a solar cell’s manufacture and disposal seldom seem to be discussed. Why not look for alternatives now rather than wait for problems later?

Valerie J. DelMedico
Columbus, Ohio

From the Nature Index

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