Concrete's benefits far out way those of asphalt. Concrete requires literally no major maintenance, is longer lasting, increases home value and has nicer curb appeal. Concrete's lighter color also absorbs less heat, making your yard and our planet less warm! Asphalt contains a wide array of carcinogenic compounds. To avoid these, many homeowners mistakenly use coal tar driveway sealants to maintain and improve the lifespan of their asphalt. These coal tar products are actually worse than the asphalt itself, containing up to 1,000 times as much PAHs, which has been linked to cancer in humans. Gravel is difficult to keep level and in place, requiring yearly maintenance and replacement. Dirt and mud are difficult to keep off your vehicles, while dust gets into every crevice of the inside.