Hey, not all of us can sit on all toilets!
There are quite a few porcelain thrones where, when seated, my junk touches the front of the bowl; sometimes it actually dips in the water! It's like they were designed by Asian midgets or something!
The rest of the world is using a different style toilet, with 1/10 of the water than the US.
I'm also sitting. Once check, how much byproduct ends up on the floor and the furniture, if you use it standing.
We've had "water saver" toilets here for at least 20 years. (Incidentally, they absolutely suck*; or should I say, they *don't* suck, which is the problem! They frequently require multiple flushes to evacuate the waste after you evacuate your bowels... So they don't really save any water, do they?)
*Some of the more expensive low flow toilets do actually work well, but you don't see them as often because of the cost.
To mandate the use of an eco friendly shitter, is, well, shitty! If I want to be green while dropping brown, I can just put a filled gallon milk jug in the tank (thus displacing the water which causes less to be used with each flush), but I don't need it forced down my throat (or up my butt, as it were).
If you *really* want to save the planet, let's talk about getting rid of toilet paper: I don't say this often, but the French really have the right idea with the bidet! You can actually get a replacement toilet seat, that's heated (!) and works as a bidet (it even warms the water). :-}