Paris is the third most visited city in the world - 50 million tourists made the trip last year. But the city has had enough of some kinds of tourism, particularly large groups on tour buses - and wants to restrict them from its center. Elena Casas reports from the French capital.

The city of love is on every traveller's bucket list, but Parisians haven't always been the best at welcoming them.

"They are not really service orientated, sometimes they're quite rude, so it's not so comfortable when you're in a restaurant or that kind of thing."

"We were trying to ask where to go, no-one would have anything to do with us, all they did was speak French, we were trying to say we were English and didn't understand and they weren't helpful at all, they were very rude."

"We're finding them fantastic, when we arrived yesterday they couldn't have been more helpful, we came into Montmartre yesterday and went to a couple of places for coffee, and everyone was really friendly."

Now, it's the mayor's office accused of being unwelcoming - following a crackdown on Airbnb, with a law limiting short-term lets to 120 nights a year, it's tour buses than are in City Hall's sights.

ELENA CASAS PARIS "There are four hop-on hop-off tour bus companies like this operating in Paris at the moment, taking tens of thousands of tourists every year. But City Hall says they are too polluting, clog the traffic and take up too many parking spaces. The city wants to encourage tourists to use public transport, walk and cycle instead."

Showing tourists the sights from a double-decker is set to get tougher - bus companies have until September 10th to prove their fleet will be using 100 per cent clean energy by 2024, or they will lose their licence to operate. The new rules also cut the numbers allowed to 36 buses per firm, something the companies say is unfair.

GHISLAIN DE RICHECOUR CEO, FOXITY BUSES "Our clients, like a lot of tourists in Paris, are older, not young people going partying, and these older people, or those with reduced mobility, can't use public transport. So you have to realize this is a need tourists have everywhere, and it would be illogical if one of the most touristed cities in the world didn't have this popular service."

According to the city's own figures, only 8 per cent of visitors went on any organised tour last year, so a crackdown on buses should not hit Paris' 23.8 billion dollars in annual earnings from tourism too hard. Guides say they're particularly popular with certain nationalities, like the Chinese, but with or without the double-deckers, the City of Light is likely to keep drawing the crowds. Elena Casas, CGTN, Paris.