Question: When did air pollution start in the city where Spectre was filmed after filming where Giovanni Gronchi died?

<P0-S0> It has been said that ``Mexico City's air has gone from among the world's cleanest to among the dirtiest in the span of a generation. <P0-S1> ''Historic air pollution episodes of the 1950s led to acute increases in infant mortality. <SEP> <P1-S0> With filming completed in Rome, production moved to Mexico City in late March to shoot the film's opening sequence, with scenes to include the Day of the Dead festival filmed in and around the Zócalo and the Centro Histórico district. <P1-S1> The planned scenes required the city square to be closed for filming a sequence involving a fight aboard a Messerschmitt-Bölkow-Blohm Bo 105 helicopter flown by stunt pilot Chuck Aaron, which called for modifications to be made to several buildings to prevent damage. <P1-S2> This particular scene in Mexico required 1,500 extras, 10 giant skeletons and 250,000 paper flowers. <P1-S3> Reports in the Mexican media added that the film's second unit would move to Palenque in the state of Chiapas, to film aerial manoeuvres considered too dangerous to shoot in an urban area. <SEP> <P2-S0> burton planned to start filming in october 2002, but principal photography in alabama did not begin until january 13, 2003. apart from filming in paris for one week in may, "big fish" was entirely shot in alabama, mostly in wetumpka and montgomery (such as the cloverdale neighborhood). <P2-S1> brief filming also took place in tallassee and on the campus of huntingdon college. <P2-S2> scenes for the town of spectre were filmed on a custom set located on an island in lake jackson between montgomery and millbrook, alabama, adjacent to the alabama river. <P2-S3> principal photography for "big fish" in alabama continued until the first week of april. <P2-S4> and is estimated to have generated as much as $25 million for the local economy. <SEP> <P3-S0> hyderabad produces around 4,500 tonnes of solid waste daily, which is transported from collection units in imlibun, yousufguda and lower tank bund to the dumpsite in jawaharnagar. <P3-S1> disposal is managed by the integrated solid waste management project which was started by the ghmc in 2010. rapid urbanisation and increased economic activity has also led to increased industrial waste, air, noise and water pollution, which is regulated by the telangana pollution control board (tpcb). <P3-S2> the contribution of different sources to air pollution in 2006 was: 20–50% from vehicles, 40–70% from a combination of vehicle discharge and road dust, 10–30% from industrial discharges and 3–10% from the burning of household rubbish. <P3-S3> deaths resulting from atmospheric particulate matter are estimated at 1,700–3,000 each year. <P3-S4> ground water around hyderabad, which has a hardness of up to 1000 ppm, around three times higher than is desirable, is the main source of drinking water but the increasing population and consequent increase in demand has led to a decline in not only ground water but also river and lake levels. <P3-S5> this shortage is further exacerbated by inadequately treated effluent discharged from industrial treatment plants polluting the water sources of the city. <SEP> <P4-S0> The unhappy Tambroni experiment tarnished Gronchi’s reputation for good, and until the end of his period of office he remained a lame-duck President. <P4-S1> In 1962 he attempted to get a second mandate, with the powerful help of Enrico Mattei, but the attempt failed and Antonio Segni was elected instead. <P4-S2> As he ceased to be Head of State, he became a life senator by right, according to the Italian Constitution. <P4-S3> He died in Rome on 17 October 1978 at the age of 91.