"Lifestyle" vegans

[the_old_soul]

I have been hearing a lot about the distinction between diet vegans and lifestyle vegans lately. I consider myself a lifestyle vegan, but wonder what they means, exactly. Being vegan I take into account more Greenie principals, like not using plastic bags in markets, buying recyclable material (and recycling anything I can get away with) not wearing leather, wool or silk, or eating un-organic foods that may have had pest-killers used on them. I've been getting a lot of comments along the lines of "That's not vegan living, that's Green politics!"
Would those two things be seperated or blend into the same philosophy?