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Some 50% of all urban trips are under 5 km. By taking public transport instead of the car, motorists can play an important role in reducing the negative impact on our environment. The International Association of Public Transport (UITP) and the United Nations Environment Programme (UNEP) launched a joint television campaign to encourage individuals to change their daily behaviour. Carbon dioxide (CO2), one of the greenhouse gases, strongly contributes to climate change. With 95% of transport's energy derived from fossil fuel, transport is a major emitter of CO2
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