Question

A study in the 1990s found that residents of Mexico City had higher levels of lead and cadmium in their blood than did residents of any other urban area in the world.
What is the MOST LIKELY explanation for this?
A) diet
B) heredity
C) air pollution
D) water pollution

Answer 1

the option is a diet

Answer 2

Many countries, including Mexico, are facing a largely unrecognized epidemic of low-level lead poisoning. Mexico is the sixth largest lead-producing country in the world, and 40% of its production is used locally in different industrial processes that cause lead contamination of the environment. The major sources and pathways of lead exposure among the Mexican population are gasoline emissions, lead-glazed ceramics, leaded paint, and lead in canned foods and beverages. In this paper we present evidence for the presence of lead in different environmental media and its impact on blood lead levels of the Mexican population.