Natural, Environment
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just small durable plants. Its climate, characterised by
low temperatures, is similar to the polar climate.
...are mostly situated around the biggest cities. Mexico City
and Beijing (China) are the best-known examples. The
pollution may be caused by junkyards, mines, factories or
other heavy industry facilities as well as by humans
themselves. For example by using cars which pollute the
environment with their exhaust gases. On the other hand,
there are also polluted areas caused by accidents, for example
the city of Chernobyl in the Ukraine, where the accident at the
Chernobyl power plant in 1986 caused large nuclear pollution.