I figured you would turn off at that point.
But look past that and consider the logic. You don't need perfect information to make decisions--which is good, because we never have perfect information. What you do is look at the different possibilities and their costs and consequences.
So, we have some probability of anthropogenic climate change, and we have a range of options from "do nothing" to "do a lot." What kind of policy should be implemented? For each option you'd want to consider the impact if global warming were true, and the impact if it were false. The option that has the best average outcome (weighted by the probabilities you assign to the two outcomes) is the one we should select. Basic decision theory under imperfect information.
So even if you believe that we probably are not causing global warming, just how certain are you? Because the consequences of not reducing emissions under many projections are catastrophic, and investing in alternative energies, taxing gasoline so that you can't drive your SUV, eating more vegetables--none of these are very bad options at all, compared to the possibility of global collapse.
So, we have some probability of anthropogenic climate change, and we have a range of options from "do nothing" to "do a lot." What kind of policy should be implemented? For each option you'd want to consider the impact if global warming were true, and the impact if it were false. The option that has the best average outcome (weighted by the probabilities you assign to the two outcomes) is the one we should select. Basic decision theory under imperfect information.
So even if you believe that we probably are not causing global warming, just how certain are you? Because the consequences of not reducing emissions under many projections are catastrophic, and investing in alternative energies, taxing gasoline so that you can't drive your SUV, eating more vegetables--none of these are very bad options at all, compared to the possibility of global collapse.