Golf – golf loses about as many new players as it attracts each year, so if you are just starting, buy used, and/or begin with a half set of irons. As you improve, you can add!
Tennis – play outdoor, during daylight. Lighting a single tennis court can consume over 4,700 kilowatthours of energy per year – enough to power the average home for about 6 months!
Surfing / beach combing – stay on the appropriate paths, keep your vehicle on the road, & help protect the dunes by not climbing over them!
Source: The Green Book