#wanttoknow! – the Tomorrow Today viewer question comes from Amula Dorley in Monrovia, Liberia
Soils are a double-edged climate sword. They are huge reservoirs of organic carbon and can act as a carbon sink. But they can also release CO2 into the atmosphere when used unsustainably.
Earthworms help recuperate soil and enrich it with much needed minerals. But environmentalists are concerned as earthworms have come under threat from intensive use of manure and acidic soil.
Some plants can suck up and store heavy metals. They can help clean up contaminated soil and extract valuable metals from the ground by a process of phytomining - all without a pickaxe or shovel.
In Brazil, indigenous and traditional communities are fighting for their land in the face of threats from big businesses, mining and environmental destruction. In some cases, the peoples' very survival is at stake.
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