We aren't reacting at all because the people in power don't care.
And with that I don't even mean politicians -although the narrative is popular- but in many cases the voters who just want to live the few decades they have left as always without any changes.
This is less about malicious people and more about tragedy of the commons. Most people don't want to see the environment destroyed, but are acting under their own incentives. If I cut down a tree it seems to makes a negligible different to the forest and my family gets to be warm that night. But if a million of us do it the forest is gone.
Multiply that by several generations and increasing power due to technology and we're here now, still under the same incentives