Protect the environment? It will protect the environment like every “free trade” agreement back to NAFTA which is to say not at all. The whole point of these agreements - and the reason they are done in secret by business interests and government types who directly serve business interests - is to make it impossible to protect the environment or workers’ interests.
Oh, they’ll say “Once the important parts are taken care of we will get right on those environmental protections and do something for labor.” That day has never, ever come. It’s on to the next one. What they do very effectively is make it illegal via treaty obligation for any of the participating countries to pass laws which would protect the environment. We’ve seen this many times already.