Last week, Microsoft pledged to be carbon negative across direct emissions AND its supply chain by 2030. Its pledge to include the supply chain follows similar moves by Apple.

Microsoft will put in place procedures to push its suppliers to reduce its environmental footprint. And for Microsoft, carbon neutrality is not enough - it says that after reaching its 2030 goal, it will, by 2050, remove from the environment all of its historical emissions since the company was founded in 1975.

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