West Bengal Transport Corporation (WBTC) wants to curb air and noise pollution levels in Kolkata. To achieve the objective, it is depending on 80 electric buses expected to start plying in the city soon albeit in a phase-wise manner. The state is said to be working out a uniform rate to simplify the automatic fare collection system. With half of the 20 lakh vehicles plying in the city known to run on diesel, of which commercial vehicles account for approximately two lakh, WBTC is known to be bringing 30 battery chargers to the terminals. About 10 turbo battery chargers are expected to be placed along emergency routes. Routes are also being mapped such that a bus can do three round trips on a single charge. Additionally, rooftop solar cells are being considered to recharge batteries on the fly.