Câu hỏi:Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions.

 

Green spaces above our heads
Roof gardens, or gardens built on the top of city buildings, have become very popular in recent years, particularly in developed cities. It is even predicted that they will be the future of city architecture. This is because lack of space and overpriced land in cities makes it difficult to increase the number of parks and other green areas. So, what makes these ‘green roofs’ so attractive to city dwellers?
Roof gardens can improve air quality in cities. Plants take in and keep heat and light, and help to cool the environment around them. This way, green roofs help reduce greenhouse gas emissions related to heating and cooling buildings. They also help decrease dust pollution and the formation of smog, a mixture of smoke and fog, which is common in big cities.
Moreover, green roofs can provide new habitats for wildlife. They can help reduce the impact of urban development on habitat loss. For example, the City Hall in Chicago, the USA, has become home to more than 20,000 plants of over 150 different kinds. The living roof of Vancouver Convention Centre in Canada hosts 400,000 plants and 60,000 bees. Roof gardens also attract birds and insects, which increases the biodiversity in the area.
In summary, roof gardens can reduce pollution and improve human interaction with nature by introducing green space into the built environment. Connecting with nature is beneficial to our physical and mental health, and can increase quality of life.