I think that the Gospel would require us to make every effort to use our stewardship--this earth--wisely and to not waste its resources or pollute it. I don't think we'll find much to support this in statements from Church leaders, but take a look at these Ensign articles:
- G. Michael Alder, “Earth—A Gift of Gladness,” Ensign, July 1991, 27 (Note the discussion on global warming--that was 15 years ago)
- A. B. Morrison, “Our Deteriorating Environment,” Ensign, Aug. 1971, 64
- “Using Earth’s Resources Well,” Ensign, Sept. 1993, 54
- Anne Billings, “Paul Cox—Preserving God’s Creations,” Liahona, Nov. 1998, 32
- "The leaders of the Church continually cry out against that which is intolerable in the sight of the Lord: against pollution of mind and body and our surroundings...." (Spencer W. Kimball, “The Lord Expects Righteousness,” Ensign, Nov. 1982, 4)
- "We recommend to all people that there be no undue pollution, that the land be taken care of and kept clean to be productive and to be beautiful...." (Spencer W. Kimball, “Why Call Me Lord, Lord, and Do Not the Things Which I Say?” Ensign, May 1975, 4)
So, does the Lord expect us to all be tree huggers? To a degree yes though not to excess. The Lord gave us this earth to use, but we must use it wisely and with gratitude as righteous stewards.