We could postpone healthcare reform a decade, and the cost would be terrible — all the suffering not responded to over those 10 years. But when we returned to it, the problem would be about the same size. With climate change, unless we act fairly soon in response to the timetable set by physics, there’s not much reason to act at all.
Unless you understand these distinctions you don’t understand climate change — and it’s not at all clear that President Obama understands them.
That’s why his administration is sometimes peeved when they don’t get the credit they think they deserve for tackling the issue in his first term in office. The measure they point to most often is the increase in average mileage for automobiles, which will slowly go into effect over the next decade.
It’s precisely the kind of gradual transformation that people — and politicians — like. We should have adopted it long ago (and would have, except that it challenged the power of Detroit and its unions, and so both Republicans and Democrats kept it at bay). But here’s the terrible thing: it’s no longer a measure that impresses physics. After all, physics isn’t kidding around or negotiating. While we were discussing whether climate change was even a permissible subject to bring up in the last presidential campaign, it was melting the Arctic. If we’re to slow it down, we need to be cutting emissions globally at a sensational rate, by something like 5% a year to make a real difference.