Owners of factories to control their workers
Any kind of transportation using fuel will cause polution. Less Fuel = Less Polution
Ratification of a constitutional amendment
There are quite a few birds famous for doing ritualized mating dances, so I would only list 5:
The Red Capped Manakin,
The Black-footed albatross,
The Western and Clark's grebe,
The Superb bird of Paradise,
& The Victoria's riflebird.