Eduscape | Quiz Unit11 | Plants as Partners in the Challenge of Climate Change

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A tree needs a lot of space for its roots in order to grow. Especially trees in streets suffer from . Densely built-up cities take valuable space and the constant vibrations of the cars shake the ground and make thus impermeable to air. - by road salt and dogs urine - additionally stresses the tree. Concrete and asphalt is heating up the surrounding area at day and night so the tree is exposed to around the clock. At least the climate change that brings higher temperature into the cities and in our cities weakens the trees in cities.

To improve the living conditions of the trees it is necessary to plant more plants, to generate cool and fresh air, develope new planning concepts, that are able to react to the new living conditions and to support the suffering existing trees.

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Trees not only beautify our streets and squares, they also regulate the urban microclimate and have a positive effect on our health: Paved and dark surfaces such as streets are up to 40°C warmer in direct sunlight than areas overgrown with plants. Green spaces therefore act like systems. In the shade of a tree, the temperature is only felt to be about half as high as in the blazing sun. Trees also the city air. They the levels of ozone, nitrogen oxides, carbon monoxide and sulphur in the air. They also fine dust and oxygen. But trees have many other functions that are good for us.