People didn't care about the externalities of burning coal until we had scaled the technology. The externalities of large scale solar PV are not just bad, they

People didn't care about the externalities of burning coal until we had scaled the technology. The externalities of large scale solar PV are not just bad, they're impossible. https://www.ted.com/talks/david_mackay_a_reality_check_on_renewables?language=en https://www.ted.com/talks/david_mackay_a_reality_check_on_re...