I don't believe I am saving the earth by keeping and rescuing bees. I do those things though as well as growing a lot of my own vegetables, heavily recycling, planting native saplings, making and setting up dozens of blue bird houses over 30 acres and even regularly picking up trash out of the creek that runs through my back yard, etc. The earth will be here until the sun swallows it in a billion years or so. We're not going to save it. Whether or not we will be around when that happens has yet to be seen.
We aren't going to save the Earth in the geological sense, you are right. But whether we are here for much longer depends very much on exactly the sorts of conserving actions you are taking. Thanks for what you are doing . Don't underestimate the importance of what you and many like you are doing every day.
What's wrong with hippie slogans? :-D Ok, maybe they were not very effective, but at least they didn't wantonly destroy the environment for short term profit, like so many of the supposedly serious business people do.
Bjorn, I have a suggestion for you. Since "saving the Earth" is a bit over the top for some folks, what about the following, which combines ideas from the top two choices in your survey.
"Building a sustainable future, one flower at a time."This takes the general idea that would interest non-beeks and brings it down to the specific bee related formula. Also, I think it impossible to hear this slogan without visualizing bees moving from flower to flower, a very positive image to associate with your function.