In the sixth chapter of the Quran, human beings are named as the inheritors of Earth:
"And it is He (God) who has made you successors and inheritors (khala'ifa) upon the earth and has raised some of you above others in degrees [of rank] that He may try you through what He has given you. Indeed, your Lord is swift in penalty; but indeed, He is Forgiving and Merciful." (Qur'an 6:165)
View the list for more reasons why Muslims are to treat the Earth well and fulfill their role as 'noble janitors' of the planet.
Special thanks to TheEcoMuslim.com