3 words riddle

肉红色，联两代，非裙带。
公断人, 断黑白，要分明.
树荫下，人生气，脸气绿.

Red meat, together two generations, non-crony.
Umpire, off black and white, should be clear.
Under the shade of a tree, people angry, face green gas.

(one is in)