I'm still working away on finishing the tile in the shower. Due to bad estimating on my part ("He estimated...poorly." Well, I added up my measurements poorly), I don't have enough bullnose pieces to finish it (they're on order). But I've got the floor and all but the bottom row of the walls covered. I'll grout everything else then finish the bottom row (and the lip where the bullnose goes, of course) so the bottom row can lap the grouted edges of the floor.
I'm starting to gather that tile isn't the most eco-friendly floor covering because of its manufacturing, but besides plasticy liners, there aren't a lot of other options for showers. And the tile will last a long time (75-100 years), so it's the greener of the two options. Taking a shower, is of course, better than taking a bath on the green scale, because it uses less significantly less water (2-3 gallons per minute vs. 30+ gallons).
Speaking of green, there's a nice little summary over at TreeHugger of the 8 most important actions you can take to go green. It's summarized from a lengthy but interesting e-book by David MacKay called Sustainable Energy - Without the Hot Air. A couple are home-based (e.g., turn down your heat, switch to compact fluorescents), but two of the biggest are transportation-based (e.g., stop flying, drive less and slower). While some of those things are difficult, the nice part is that they all save money.
But the math underlying it all suggests that we all need to do those things and more, as well as develop renewable energy sources. Adding up all the possible renewable energy sources and even nuclear (there's a finite supply of uranium, too) suggests that new energy sources alone won't add up to enough given our current energy usage. We need to reduce our usage levels and develop renewable sources.