in fact,nly eht other countries worldwide have a more serious problem than serbia. the authorities say belgrade's streets carry 80,000 more cars than they did five years ago. and many of those are old less efficient models, rejecd wealthier parts of europe. getting more people on bikes would help but safe cycling paths like this aren't widespread in belgrade and riding in sg isn exactly pleasant. industry, power and heating add to the pollution, so a quick fix to this chronic problem seems unlikely. t serbia needs fresh thinking to give people a chance to breathe. ♪[music] >> the u.k. government has ntal changes to the way convicted terrorists are handled following yesterday's knife attackn south london. a man was shot dead by police, after he shot two people. he'd recently been freed from prison after serving half a sentence for terrorism offens. here's our special correspondent, lucy manreng. rter: this unfortunately is not the first time a high street, forensic teams police investigating an attack, a former prisoner using his eedom to try a kill. yesterday, it

in fact, onlyth eight countries worldwide have a more serious problem than serbia. the authorities say belgrade's streets carry 80,000 more cars than they did five years ago. and manyref those a older, less efficient models, rejected in wealthier parts of europe. getting more people on bikes would help but safe cycling paths like this an't widespread in belgrade and riding in smog isn't ectly pleasant. industry, power and heating add to the pollution, so a quick fix tohis chronic problem seems unlikely. buteeerbia fresh thinking to give people a chance to breathe. ♪[music >> the u.k. government has promised fundamental changes to the way convicted terrorists are handled following yesterday's knife attack i south london. a man was shot dead by police, after he shot two people. he'd recently been freed from prison after servingalf a sentence for terrorism offenses. here's our special correspondent, lucy manning. reporter: this unfortunately is not the first time a high street, forensic teams police investigating an attack, a former prisoner using his freedom to try