Whilst Elon deserves to be bashed, I don't get why you persist with statements like "6g of carbon dioxide per kWhr" - coming up with any figure at all for this requires that we ignore the most intuitive use case of using solar energy itself to supply all energy of manufacturing solar collection hardware. The only reason factories might not yet be solar powered themselves, are that the governments of whichever countries they are located in, insist on indirectly owning their energy supplies, so they can charge for it, making an income for the government, in addition to, or as an alternative to collecting business taxes. To get over that, governments themselves need to become solar powered communities, then issuing all monies on the solar energy recieved and put to use (Thus creating economic product, which justifies issue of monies other than as debt). Hence why we will have solar indexed stimulus, sooner or later, one way or another, the sooner the better.,

On the energy Use case of having solar farms in space beaming energy back to Earth - compare with the expense of just ramping up coverage of solar required for all to be powered on a domestic and community basis, by just having the installations concentrated around habitats and workplaces - even backed by hydrogen, as needed for every community to create valuable product, keeping all aerospace airborne with clean fuel.

After we've got that, what will be the point of having extraterrestrial solar energy collection?