trillions of kg/yr of anything will effect the environment in some way, since "the environment" is just the emergent properties of all of the things in the earth system and trillions of kg/yr of stuff is a lot of stuff. If you added (or removed) 10^12 kg of water (or literally anything else) to the planet, it would change the environment in detectable ways.
If we want to be charitable, then perhaps you’d see that my point was specifically about how the scale was important, and that averaging impact out over the entire globe was perhaps not the correct scale
