Stargate Atlantis, Season 2

[Major Lorne and Dr. Parrish are walking through a forest on P3M-736]

Maj. Lorne:
You know, when they told me I'd be travelling to another galaxy, visiting strange new worlds, defending humanity against unimaginable alien threats, this just is not what I pictured!

Dr. Parrish:
We could be saving Earth -- right here, right now, Major.

Maj. Lorne:
Oh yeah? How's that?

Dr. Parrish:
Through a greater understanding of the long-term effects of severe ozone depletion on plant life. You may not want to admit it, but it's a real danger.

Maj. Lorne:
[sarcastically] Oh yeah! Sure! Global warming -- Wraith attack. I see the similarity now, you're right! Yeah, it's great!