Disposable MTR tickets are a threat to the environment and should be scrapped, a green group says. Single-journey and same-day return tickets for the Airport Express are returned to passengers by turnstiles after their trip to or from the airport is complete. The MTRC says the tickets are given to passengers 'as souvenirs' of their trip. But Plato Yip Kwong-to of Friends of the Earth attacked the company, saying the tickets would inevitably be thrown out, increasing pressure on landfills. He said the new tickets, made of laminated paper, should be reset like the old common stored value ones and could then be re-used. 'Making them re-usable is a very simple thing to do . . . this souvenir thing is just an excuse,' Mr Yip said. The Airport Express has seen average daily patronage of about 27,000 since its launch on July 6.