The humble plant that could save the world — or destroy it

The Hudson Bay peatlands are a haven for biodiversity and a powerful carbon sink. | The Water Brothers & Wildlands League The largest herds of caribou in the world make their homes here. Polar bears give birth to cubs in dens dug into this soil, some of them more than 200 years old. And birds like the Arctic tern fly north every summer, some from as far south as Antarctica, to breed and lay their eggs.  The Hudson Bay peatlands in northern Canada, a 90-million-acre area stretching from northern Manitoba to Quebec, are a haven for biodiversity, home to more than 1,000 species of p