So I'm doing a report on permeable parking surfces, and turning to Google, I realized again how truly powerful the internet is. I havn't been in a library in ages, and I got almost everything I wanted in a matter of an hour or two.

Of course, getting loads of raw data is still difficult, and much of it is unavailable.

Today's challenge:

1) Find the average percentage of cities that is covered in pavement.
- I've found two - Toronto 40%, and L.A. 60%, but need something more general.
2) What percentage of that pavement is:
a) Roadways
b) Shoulders of roadways
c) Parking lots (broken down into heavy use and lightly used)
d) Walkways
e) Other.

I think I've finally pushed Google to its limits. Thing is, I doubt the library will have this info easily available either. Time to make some phone calls.