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Converting greenhouse gas emissions into energy-rich fuel using nano silicon (Si) in a carbon-neutral carbon-cycle is illustrated. Credit: Chenxi Qian

Saving the planet from climate change with a grain of sand. Every year, humans advance climate change and global warming – and quite likely our own eventual extinction – by injecting about 30 billion tonnes of carbon dioxide into the atmosphere. A team of scientists from the University of Toronto (U of T) believes they’ve found a way to convert all these emissions into energy-rich fuel in a carbon-neutral cycle that uses a very abundant natural resource: silicon, the 7th most-abundant element in the universe and the 2nd most-abundant element in the earth’s crust.

The idea of converting carbon dioxide emissions to energy isn’t new: there’s be...