This appears to be a CNG hybrid-electric truck, not an electric one. Hybrid-electric buses (diesel or CNG engine generates electricity for electric motor, which

This appears to be a CNG hybrid-electric truck, not an electric one. Hybrid-electric buses (diesel or CNG engine generates electricity for electric motor, which spins the wheels) have been around at least for a decade. What's different/new about this? Also, from memory, burning CNG generates about half the pollution of burning diesel.