A turning point in Civilization, Mass Production ushers in an era of explosive manufacturing. Mass Production allows for the rapid manufacture of the <l:1,116>Destroyer<e>, while land armies are enhanced by the addition of the cheap <l:1,23>Conscript<e> and the fast <l:1,87>Armoured Recon<e>. In addition, this Advance opens the door to the power of oil and gas, thus allowing Civilizations to build the <l:2,26>Oil Refinery<e>, which increases <l:6,93>production<e>. Sadly, it all comes at a price: the <l:6,91>pollution<e> in all <l:6,104>cities<e> in the Civilization is increased considerably.