Something that I have also heard is that as well as just purchasing renewable energy, Google is also offsetting the carbon from their entire operations. So e.g. they calculate the average employee commute carbon emissions, or the carbon emitted in the supply chain for getting the free sushi to employee's mouths etc and offset that too.

I like that if it is true. I can't find anything specific on their report (1) - it is kinda vague: they say they're using renewable energy and are carbon-neutral in the same sentence, so not sure if that is just energy or the entire operation.

1 - https://sustainability.google/reports/environmental-report-2...