Open this photo in gallery: Local Police officers check the scene of a passenger bus accident in Mestre, near the city of Venice, Italy, on Oct. 4.Antonio Calanni/The Associated Press Italy’s transport minister is questioning the spread of electric vehicle technology following the fiery crash of a fully electric shuttle bus that killed 21 people in mainland Venice. But the battery chemistry used by the Chinese bus maker makes it less prone to catastrophic fires, experts said. Transport Minister Matteo Salvini said the accident involving an electric bus that drove through an overpass guardrail during rush-hour Tuesday should be “cause…