HELPP What are the main sources of air pollution in Mexico City?
Group of answer choices

intense sunlight

cars that produce little or no air pollution

factories and cars

the high altitude

c. factories and cars

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.