Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks.

Stockholm dwellers are fortunate to live in one of the greenest capitals in the world. And they try their best to keep it that way. The city is well-known (24) ________ its cycle paths and lanes full of commuters wearing helmets. For people who prefer public transport, there are buses and taxis that run on renewable energy, (25) ________ is really good for the environment. Besides, both public and private transport can use upgraded biogas produced by waste-water treatment plants applying (26) ________ technologies. Visitors to Stockholm will be amazed to see that all hotels, hostels and guest houses (27) ________ environment-friendly and certified with eco-labels. It's so great that almost 100% of the household waste in the city is recycled and is used for heating and electricity. There is no doubt to say that waste in Stockholm is converted into valuable resources. With the recycling revolution and (28) ________ waste management, Stockholm has been reducing the amount of waste to rubbish dump to less than 1%.