It's only too expensive for the bottom lines of oil and gas companies and on those who are dependent on fossil fuels. Will nobody think of the shareholders as we once again count the dead?

Exactly. We threw a trillion at Y2K because there were no powerful interests that stood to gain by ignoring it. The CFC ban (mostly) worked because corporations can make & use other chemicals. Carbon-based capital is stranded, and will try to take all of us down with it just because it can.