In Brisbane there was a huge uptake of water tanks to avoid trhe water restrictions we were having. So for a purely personal/selfish reason rather than for a high minded enviromental reason. The Green Party seems to get an average of around 8% of votes in an election. Maybe that's is just in city regions, don't know what it would be in country areas.
I think from my reading that there are two main areas of thought when it comes to conservation. There is the school of thought that thinks that everything on earth is here for our benefit and so we should conserve things because we like/want/need them. So conserving whales is good because people like whales and they generally don't do any harm but if a dingo attacks a child on Fraser Island then all dingos should be exterminated from the island. Rainbow lorikeets are nice because they are colourful but crows are just a damn nuisance and should be got rid. And don't get started on noisy. smelly dangerous fruitbats.
Then there is the school of thought (which is my thought) that we are just a part of an entire amazing wonderful world and because we are the most intelligent being on this planet we have a responsability to be careful stewards, not because it would benefit us but because everything has a right to exist despite us.
Then there are those who are just too busy coping with all the crap in their lives to spare the time to be concerned about such things. It isn't that they are neccessarily dumb but when you lose your job, have a huge mortgage to pay, hate your job but cannot leave it, worrying if your teenage child is taking drugs etc etc etc the enviromental is very low on the list of priorities.
Like you Phoenix I get very depressed because I tend to be cynical abd look at things in a half empty glass way. There are times when I think why should I bother caring when really it doen't do any good and only makes me unhappy. But if I didn't care I wouldn't have any hope and that would be just too bleak.
I'm not a good logical thinker but I try to be. Some things are just so complicated that I don't have a hope of understanding the issue and all the ramifications (Global warming for intance) and sometimes I let personal likes and dislikes get in the way (hunting anyone?).
BTW I always vote with the enviroment foremost in my mind but that may be a luxary as I have a secure job, people I love and trust, money in the bank and a secure home to live in.