Nature & outdoors icons

Gaia 09
31 icons
Free for personal use only
Marius Bauer
Elements icons
12 icons
Free for commercial use
Ballo Marco
Green Energy Initiative
10 icons
Free for commercial use (Include link to authors website)
Makeable
Rock The World (Free Sample)
10 icons
Free for commercial use (Include link to authors website)
Royyan Wijaya