Complex sentence: Through their various energy efficiency projects, the company have managed to stop more than 5 million tonnes of carbon pollution from going into the atmosphere, equivalent to taking around 1.2 million cars off the road !
Split into simpler sentences: Through their various energy efficiency projects, the company have managed to stop more than 5 million tonnes of carbon pollution from going into the atmosphere. That's equivalent to taking around 1.2 million cars off the road!