deforestation乱砍滥伐.ppt

Deforestation
----group 5
1
2
3
4
Phenomenon
Causes
Harm
Solution
As time goes , there are more and
more world problems about
nature and development.
Deforesation is the most serious
environmental problem that the
earth has to face.
Phenomenon
With more and more trees cut down,
many kinds of birds or animals have
no homes and e extinct(灭绝的).
Just a few years later, we
will not be able to see so many
lovely and beautiful creatures
which once exist.
Phenomenon
With more and more trees cut down,
lots of good land e deserts.
Then the soil will be washed away
more easily ,which will eventually
lead to floods and droughts .
Phenomenon
Do you remember
the Big Flood
that broke out
in 1998?
We should realize that it is
we human beings that has
strengthened the power of
the flood, for we’ve cut down
so many trees near the
Changjiang River.
Causes
Thought
awareness
Management
Building information
networks
Law
enforcement
Thought awareness :Some people have lack of understanding of the existing laws.
Management:Some managers dereliction of duty(失职) when they treat with the approval process(审批程序)of cutting,they do not act in accordance with the provisions(不按规定办事).
Building information
networks: work is not
Perfect,resulting in many cases can not be effective for the first time.
Law enforcement: plete legal system itself is an important factor and parts of law enforcement officers don't enforce the law strictly.
cause
Secondly
Firstly,
Thirdly
harm
Some species, mainly plants and animals, will be in danger of dying out as the large area of deforestation, and the biodiversity(生物多样性) in the forest will be cut down in some degree.