GSS respondents were asked whether they believed that: 1) nature is sacred because it was created by God; 2) nature is sacred in itself; or 3) nature is important, but not sacred (sample size = 3,505). Of the people who "know that God exists", 54 percent gave answer 1; 18 percent gave answer 2; and 28 percent answered number 3. In other words, most believers think nature is sacred because it is God's creation.
But here's the weird part: 13 percent of the 92 surveyed atheists said that nature is sacred because it was created by God. (Twenty-seven percent answered 2, and 60 percent answered 3). "Atheist" is defined as "not believing in God." Unless the 12 atheists who gave 1 for an answer are retarded (or perhaps there was some other type of miscommunication) they mean something else by "doesn't believe in God." I can imagine people interpreting the statement to mean "I don't follow or agree with God."
According to the GSS, only 2.6 percent of Americans say they do not believe in God. It might be the case that fewer actually do not believe in the existence of God.
It's interesting too that atheists are less likely to give nature an elevated status. Sixty percent of them say that nature is important but not sacred, compared to 28 percent of believers. Perhaps a more secular term like "cherished" would have elicited more affirmative responses; perhaps atheists are less likely to give anything a really elevated value--I don't know.