A good environmentalist is by definition a good conservative. "Conserve: from Old French conserver (9c.), from Latin conservare "to keep, preserve, keep intact, guard," from com-, intensive prefix (see com-), + servare "keep watch, maintain"
For conservative christians, environmental responsibility is built into the first page of the first book of the bible.
God blessed them; and God said to them, “Be fruitful and multiply, and fill the earth, and subdue it; and rule over the fish of the sea and over the birds of the sky and over every living thing that moves on the earth.” Gen 1:28This is not a vision of a stripped and poisoned landscape but of good government and a garden. The task of government ("rule") includes the care of plants and birds and fish and not just pleasing the taxpayers. This a two-way street for the benefit of the creatures. (Rom 8:18-22). It starts in a garden-gone-wrong and ends in a beautiful city. The left gets excited about heading in the opposite direction, trying to shrink cities-gone-wrong and return the world to a state of nature, a free-for-all struggle for survival. Their pink goggles make the state of nature seem like heaven on earth but the elusive environmental equilibrium is simply what you get when every living creature is in open competition with everything else.