With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Varese's winters are less mitigated by the proximity of the "Lago Maggiore" and of the minor lakes surrounding it. Low temperatures in the late autumn and winter frequently go down a few degrees below zero (Celsius). This differentiates it from areas south of the city. Fog is a rare occurrence in Varese, as it is in the other cities in Lombardy's foothills. Varese is on average cooler than other cities of the Lombard Prealps, especially in winter. The rainfall of Varese is among the highest in Italy, with more than of the annual average. In winter, snow falls quite frequently, especially in January (about per year).
text_B: If heavy industrial activity had developed in Lombardy's foothill area, would lingering smog be a concern for Varese's residents, given the usual local atmospheric conditions?
NO.