In honor of Earth Day, what episode is your favorite to watch that deals with environmental issues or other earthly concerns?

I will be watching Kill Zone tonight after the kids go to bed...

For me that would be The Negotiator.
At some point MacGyver says: 'We're all in this together.'

It's a very simple truth that I keep in mind all the time, even more so after having seen this episode.
Mac shows that if you do something over there, it has consequences over here.
Everything is connected, so the people are, too.
So nobody can say: it's not my concern.

That is one of my favorite episodes as well. And Mac's right, "We are all in this together."

I find it amazing that so many of the episodes actually had these little lessons without being overly head bashing. My kids will probably watch Eagles tonight since it's one of their favorites.

Great choice Traveller!

I'd choose Negotiator as well, simply because I really like that episode, but Log Jam would be a close second. I actually think Log Jam is more environmentally focused than Negotiator.

It could be 'wasteland" The problem is just a local one but it may happen on bigger scale. I don't know, maybe "The spoilers", or "Endangered"- the problem of illegal hunting.

+1 on wasteland.