When it went carbon neutral in 2007, Google cemented its place at the top of the tree when it comes to major global companies and sustainability. It has also been matching its energy use with 100% renewables since 2017 — of which it is the largest corporate purchaser — and runs the cleanest global cloud infrastructure. CEO Sundar Pichai is as committed to the cause as ever: he's announced that Google's carbon legacy has been eliminated and that it plans to be entirely carbon-free by 2030.

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