Some commenter at LGF said this:

I can see a new campaign slogan coming after I watched a science program last night:
STOP LUNAR DRIFT!
Apparently, some scientist hundreds of years ago calculated that the moon was gradually moving further away from the Earth. When the Apollo astronauts landed there they positioned a mirror that we have been beaming a laser at in order to calculate the distance. That long ago scientist was correct; it is moving about 1 1/2 inch further away from Earth every year. Alert AlGore!

I’m most thinking it may have something to do with humans populating Earth…