But when you are thinking about living here, you have to consider things like supermarkets, dry cleaners and pet stores - in other words, all the things that make a neighborhood your own.

BBC: Living in: New York

Learn more about assisted living pros and cons here.

FORBES: A new blog for all of us with aging parents

We want to keep the Earth in about the same shape we found it, so that most of us can keep living here.

CNN: 'The Science Guy' says: 'Save the Earth'