Actually, they do
have cruddy goals the both of them.
Raising the land leaves less water (Probably the one most important thing on Earth.)
But doing the opposite of that leaves us with less space to live or none at all, we'd have to all live underwater.
[5-10 minutes later...] *drowning!*
Team Rockets just a secret criminal organization..
and Team Snagem just wants power.. or something.. I think they might've been trying to convert all the world's Pokemon... but...