Polar bears adapt to global warming

Talk about global warming. The North Pole reduced to a single ice flow and the jolly big guy who dresses in red playing the ukulele! One polar bear is doing the hula, another is drinking a tall cool drink. The third is barbecuing and holding a bottle "Seal on a stick". His apron says "Caution: bears cooking". Does that mean that a bear is cooking or that the bears are cooking?