Collective Footprints

I've been up for well over an hour, reading blogs of people who understand the impact people are having on this planet of ours. There are lots of people who are deeply aware of what we have done, are doing, and who are doing their part to change their behaviors and convince others to change theirs, as well. I think back to my odd thoughts from yesterday, wondering how many human hairs there were on my airplane and how many heartbeats are left. We're so insignificant, individually, but our collective footprints have such a horrific potential if we don't take care.