(Partial transcript)

Oak Ridge, Anderson County. Even at sun-up on a weekend morning, Lafayette Ave. in Oak Ridge is a busy road...Forestry graduate students are mapping the maples... as part of a tree inventory...

We'll go to a tree, geocode it with latitude, longitude...

Dr. Sharon Jean-Philippe.

This research effort is part of a concept known as urban forestry... Trees protect against flooding, create a natural habitat for wildlife, and help fight pollution.

'Trees are a good eliminator of exhaust coming off of cars, so urban vegetation actually helps in reducing pollution...'

Oak Ridge is surrounded by woods, including the prototype urban forest, UT AgResearch's arboretum, with more than 2500 tree and plant varieties.