The Christian faith does not believe in an ethereal kind of salvation that only encompasses a world we cannot see. Instead, because God created everything good and because He purposes to redeem His creation, we know that the final redemption He brings will encompass all things. We are therefore concerned to be good stewards of the earth, not because we worship nature, but because they are gifts of God that will one day be restored to their fullness.
For further study:
The Bible in a year: