pre-Aztec ruins being eaten by pollution

12.19.14.0.1 3 Imix 14 Muan
Pollution destroying pre-Aztec Mexican ruins Oil refineries and power stations pumping acid air pollutants along Mexico's Gulf coast threaten to erase carved stone murals at the pre-Aztec ruined city of El Tajin....(A)cid levels in the air around El Tajin, in oil producing Veracruz state, were among the highest in Mexico. The city was built on the tropical coast of Veracruz by the Totonac civilization and was at its height from the early 9th to early 13th century. ....At its peak, the city, home to an elaborate niche-studded pyramid, was a power in an area that extended toward today's border with Texas and south into the realm of the Maya civilization.
Veracruz--that's where all the Olmec ruins are too, many of them destroyed by the building of the oil fields.
I wonder if North American natives had left stone ruins if we'd be destroying them or protecting them. All the good ones are down south, and the only reason anyone seems to care is because tourists come to see them and generate revenue.
Picture sources: top pic, same as story. Other pic, Wikipedia.