US Department of Energy: SLED (Stats and Local Energy Data) provides detailed information about energy usage, talks about buildings and efficiencies, renewable power, transportation, etc. Look up data by city or state
Google Maps will show you a good physical layout of the county, from greenspace to public transportation options to whatever else you might be able to imagine.
Data USA will provide city or county-level data about demographics such as income, housing, and health. This database draws upon census data and was constructed by MIT.
You can also look for more information about any of your topics here: