Getting a free boat ride in exchange for picking up rubbish in the city? This is what a Copenhagen summer programme offers in an attempt to reward eco-friendly tourists. From mid-June until late August, the CopenPay initiative offers around 100 activities in exchange for free or reduced prices on a selection of experiences. Participants can get a coffee, pastry or concert ticket in exchange for an hour of picking up rubbish; money back on a restaurant dinner if they do some gardening; or a free