1. Our planet is home to millions of different kinds
of plant and animal species, which are linked in different ways. Together, they
make up the complex world of nature. Unfortunately, co-habiting with humans
brings up ecological problems. The most acute are pollution, acid rain,
wildlife destruction, shortage of natural resources and global warming. These
problems are interrelated as everything in the natural world depends on one
another.
2. Wild plants and animals live in a particular set of
surroundings, called their habitat. Nowadays people change habitats to suit their own. A lot of species - fish,
reptiles, insects, birds, mammals - are disappearing fast. Many plants in the
world are known to be in danger or threatened with extinction. A lot of forests
are so badly damaged that they will hardly be able to recover. It’s reported
that by 2030 25% of all animals, birds and insects may be extinct.
3. Acid rain falls when poisonous gases from power
stations and vehicles (транспортные средства) mix with oxygen and moisture in
the air. The problem could be controlled by reducing vehicle emissions and
limiting the gases released from power stations.
4. World temperatures are currently rising every year.
This phenomenon is called global warming. As the planet warms up, the water in
the oceans will take up more space and water from glaciers (ледники ) and the
polar ice caps will start to melt. This could cause sea levels to rise and many
habitats will disappear under water. The cause of global warming is attributed
to the greenhouse effect. It works in the following way - sunlight gives us
heat which warms the atmosphere. Some of the heat returns into space. Nowadays
the air surrounding the earth has become much warmer because the heat can't go
back into space.
That's why winter and summer temperatures in many places have
become higher. These changes can be dangerous for our planet which needs
protection. The measures to be taken include limitations for cutting
rainforests and poisonous gas emissions as well as personal ecology of humans.
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