ORIGINAL: young_gun

so im thinking about geting into black powder hunting. if i get one it would more than likely be a tc. i was just lookin at the state regulations, and it says hunters must use a muzzleloader rifle with open or peep sights and wear fluorecent orange, and may not use smokeless powder. so my question is, what the heck is smokeless powder? and i wouldnt have a problem with that would i?
i know probably a stupid question but i just got me wondering a little bit and i figured what better place to ask than here. thank you for you help