Solving acid rain & CFCs was (relatively) cheap & easy to implement. And: effects visible within decades. Decarbonizing our world's economies otoh is a much mu

Solving acid rain & CFCs was (relatively) cheap & easy to implement. And: effects visible within decades. Decarbonizing our world's economies otoh is a much much bigger project. Running across many sectors & involving big upfront investments. And even if GHG emissions were cut to 0 today, effect of higher CO2 will last for centuries. If no irreversible tipping points are hit. Note that in any case NO effort was made to remove substances from the environment. Only cut emissions. So yeah, one can be hopeful. But we'll be in for a rough ride anyway.