Does the quality of the fuel that is used in cars make a difference for pollution?
LUISA: The largest emissions come from vehicles. The vehicles now currently in Mexico City use diesel and gasoline. Cars are becoming cleaner- they adapted a lot of the technologies from the U.S. I believe in 1993 they actually phased out lead in gasoline. Before of course, lead had very harmful health effects. And they have been trying to lower the sulfur content which requires major investment in the refinery- actually billions and billions and billions of dollars. But then recently the government agreed that they’re going to lower the sulfur content. So, hopefully, the Mexican’s fuel is actually quite, quite good. And that of course improves the emissions. Interviewer: Why do you use balloons for obtaining data? LUISA: There are different kinds of balloons for meteorological measurements. We want to look at vertical profiles. Again that’s very essential, understanding the radiation and meteorology.. The meteorological measurements we have measure the pressure, temperature, relative
