I agree that it's uncertainty of what the climate will do that's why it's serious. But alarmists don't say that. They're somehow certain there will be a disaste

I agree that it's uncertainty of what the climate will do that's why it's serious. But alarmists don't say that. They're somehow certain there will be a disaster. There might not, and we're not sure, but they're don't dare express that uncertainty because either they're fooled themselves or they're afraid the common people who believe and vote for whatever the media tells them might use it as an excuse to not worry. That's perhaps reasonable for their goal because people generally can't handle uncertainty and convert it to a simple yes or no instead. But it's also wrong. As for people taking radical steps, of course we will - when it affects us. We'll move our cities and farms, build sea walls for the most valuable locations, etc. That's not a big challenge because almost every building on earth was built within the last century and most of them won't last another century regardless of the climate. So even if we somehow have to rebuild all of them, that's what we would have already done anyway. Infrastructure of cities is mobile on a time scale of 100 years. The CBD of my hometown was under water in the 1800s but now it's the capital city, all dry and well functioning because of massive civil works. As for nobody making those extinction arguments. Myley Cyrus said she wouldn't have children "until I feel like my kid would live on an earth with fish in the water".