If there’s anything that our inability to tackle climate change has taught us, it’s that we are exceptionally good at ignoring — or straight up denying — problems that lie in our future, especially when they affect generations other than our own. So I hate to say it, but we’ve got another one coming: The human population is aging, and our cities aren’t ready for it. Here’s the scoop from the Washington Post: By 2030, more than 1 billion people (one in eight) will be aged 65 or older, and by 2050, nearly two-thirds of the world’s population will live in urban areas. What’s needed between now and then, according to a new report from McGraw Hill Financial Global Institute, is new thinking about how…