Earth
Metal-eating plants could mine riches through roots
Plants that absorb metals from the soil could clean up old mines and allow farmers to harvest valuable resources without ruining the environment still more
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Plants that absorb metals from the soil could clean up old mines and allow farmers to harvest valuable resources without ruining the environment still more
Christiana Figueres has to persuade 194 countries to sign a deal in 2015 that will stop global warming. She tells us how she's going to change the world