Would it be terribly churlish to point to this news report?
http://cphpost.dk/news/local-news/poor-air-quality-in-copenhagen.html
Or to observe that unfriendly, car obsessed London actually has more cycling per day in km travelled than Copenhagen? A number that's still growing, and set fair to accelerate away...
It's tempting to fetishise the success achieved abroad, but it's important to acknowledge that nowhere is perfect, and that Britain has achieved a lot.