As Canadians brace for “vitamin D winter” – months when the sun’s angle is too low to produce the vitamin in the skin – a McGill University study explains why vitamin D deficiency early in life is associated with a higher risk of autoimmune diseases.

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Capturing and storing the carbon dioxide humans produce is key to lowering atmospheric greenhouse gases and slowing global warming, but today’s carbon capture technologies work well only for concentrated sources of carbon, such as power plant exhaust.

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