Not only personal cars take more and more significant part, but the ecological public transport become more popular all over the world. Beside the ecological reason the major advantage of electric vehicles is in comfort they provide for passengers – for example, reduced noise inside the interior, making it much more comfortable and cozy. Volvo tried to illustrate the positive effect with a nice campaign: for a few days one of electric Volvo buses commuting in Gothenburg has been filled with a sound of classic music by the international music camp El Sistema. Live shows quickly became known as ‘Silent Bus Sessions’.