Gravel driveways are definitely an eco-friendly option to consider, as opposed to traditional paved driveway surfaces. It allows for the surface below, grass and plants, to continue to hold their roots. There is also healthy bacteria in the ground which is not disturbed by gravel driveways. Another reason to use gravel for your driveway, is that it allows water run off to carry dirt into the ground and not into the streets and gutters. In addition, gravel driveways are less expensive to maintain, making it eco-friendly and budget friendly.