Complex sentence: Gépébus is a branding of electric autobuses made by PVI for the public transport; thanks to its electric powertrain these products enable to lower the environmental impact of the transportation issue in urban environment.
Split into simpler sentences: Gépébus is a branding of electric autobuses made by PVI for the public transport. Thanks to their electric powertrain these products enable to lower the environmental impact of the transport in urban environment.