Given how wildly profitable they are, we should be passing laws that they must produce X % of their power needs from renewable sources, where X approaches 100%. This would be a jobs program that would also help the planet. Win win. Investors would make slightly less money in the short term, but our grandchildren will be able to live. I think that is a good trade off.
> Investors would make slightly less money in the short term Why do you assume that the tax incidence falls on investors, rather than on customers and/or employees? With sales tax or VAT people tend to automatically assume 100% passthrough (so that the incidence falls completely on customers/consumers) even though they're also collected by companies. In reality taxes are borne by a combination of customers/employees/…
And any green tax would be trivial for Google to add as a line item on invoices: it’s so defensible.