Copenhagen best, Rome worst for clean, safe roads: study

Bike-friendly capitals Copenhagen, Amsterdam and Oslo have Europe's cleanest and safest transport systems while heavily congested Rome has the worst, a Greenpeace study found today.

"Safe roads and clean air go hand-in-hand," said Greenpeace Clean Air Campaigner Barbara Stoll.

"This study shows that when you improve a city's public transport infrastructure in a sustainable way, people breathe cleaner air and their roads are safer."