If you enjoy canoeing(皮划艇运动), you can paddle for free in Denmark, Ireland, Germany, Sweden and Norway, but you also have to be willing to pick up trash.
(organize) by Greenkayak, free trips in the group's two-person kayaks(皮艇) are offered in return for collecting waste from water surface. The project began in Denmark in April, 2017. With the help of a thousand kayak (voluntary), three tons of trash (collect) from Copenhagen harbor that year. You can easily book a kayak for the time being works for you. Life jackets and equipment—like a paddle, a waste picker, a bucket for the trash— (provide): just bring yourself. You can have two hours of free kayak time.
Greenkayak believes that kayaks are highly effective at collecting waste because they can get close to areas that are hard (reach).
"In Denmark, people love to hang out on canals, but (fortunate) they see waste (float) by," one of Greenkayak's co-founders speaks of the program's origin. "You can't take your shirt off and jump in. However, you can get in on the Greenkayak and make difference."
If you want to take advantage the free kayak, tour a city from its river and do your part to control water pollution.