The city hopes to offset the "environmental burden" of tourism with rewards for eco-friendly travellers.

Tourists will be rewarded with free food and activities if they participate in environmentally friendly tasks while visiting Copenhagen, the city’s tourist board has announced.

The trial scheme, which begins on 15 July, will see tourist attractions in the Danish capital offer rewards for activities such as litter-picking, travelling by public transport or biking around the city.

Under the initiative, visitors can claim free lunches, coffees, glasses of wine and kayak rental in return for their work.