What is the subject of this cartoon ? or what people groups do you think the cartoon is aimed at ?

answer; ///i believe that the correct answer is refrigerants,(like r12) and aerosol

d) he bring down boss tweed and tammany hall.

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.