Thesis
September 16, 2026 · 5 min
The Bajío's air: three problems, three maps
Salamanca breathes sulphur dioxide, Celaya breathes particulates, and ozone is rising across the whole corridor. It is not one air-quality problem, and each one has its own investment.
Regulation
August 4, 2026 · 4 min
Vapour recovery: what NOM-004 requires in Tijuana and the Bajío
Gas stations in Celaya, Irapuato, Salamanca, Villagrán, Tijuana and Rosarito must test their vapour-recovery systems and file the report with ASEA in 2025 and 2026. What the standard requires, and in which months.
Environment
July 21, 2026 · 5 min
Cars and the air we breathe in the Bajío
León had 69 days with particulates above the standard in 2024, and Celaya reached a purple alert in 2025. Cars do not explain everything, but they dominate carbon monoxide, nitrogen oxides and ozone.
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