While I understand why this t-shirt may offend Mexicans, it's folly to suggest that Mexico is not "a dirty country."
Hook Mr. Morrison up to a polygraph and ask him if he would trade the air quality of Mexico City to that of any American metropolis. Ask him if he knows of any American city where entire families live and are raised in the city dump. And, finally, ask him how many people who cross over from New Mexico to Mexico vs. Mexico to New Mexico.
Well I agree with you, but that would not fit into the PC worldview, where the Third World is a virtual Garden of Eden, and the industrialized world,( especially the evil greedy Americans:) are the major polluters.....