Nature only becomes environment when its stands in relation to society. There is no "the"environment, you should always ask "whose" environment? The quality of our environment is measured by the extent it provides you with things we think are valuable, such as food, shelter, clean water, or nice landscape.
That means that environmental protection always is about preserving some quality of the environment we think is valuable. so we put filters on our smoke stacks to prevent forests from dying of acid rain, we build water treatment plants to prevent our surface waters from being polluted with pathogens and blue algea, etc etc.
But in some way or the other, all technology aims to improve the qualities of our environment to our liking. We have agriculture to get more food orm a piece of land than an equal piece of forest or savanna would give us, we have houses because they offer better shelter than a cave.
many of these improvements have a negative impact on the environment too. You can't have a field of wheat, and a pristine forest of the same patch of field. A windmill saves greenhouse gas emissions, but destroys the landscape.
So for each technology, you can name some properties that improve our "environment", and some that damage it. Two sides of the same coin, although i find it difficult to see the upside of SUV, for instance.