(共27张PPT)
Reading and Speaking
Sandstorms in Asia
and in the World
drought
[draut]
drought
[draut]
drought
desert
desertification
strong winds
sandstorms
Think about the connections between these:
Qingdao
on March 20,2010
yellow sky
strong winds
dusty and dirty air
I found ______
I felt _______
strange
frightened
sandstorm
Forecast of sand-dust storms
2010年 03月19日20时---03月20日20时
Chinese Central Weather Station
青岛
Inner Mongolia
citizens in Beijing
Ren Jianbo felt the sandstorm was
Huang Xiaomei advised us
terrible
frightening
dangerous
to wear a mask when going out.
sandstorms
definition:
where they start:
where they occur:
strong, dry winds that carry sand
in desert areas
Central Asia,
North America, Central Africa and Australia
causes
damage
--- see ---- traffic
--- breathe---ill
destroy
ways to solve it
mass campaign
planting trees and grass
warm weather --wind
little rainfall
cutting down trees
digging up grass
climate changes
human activities
strong winds
thick dust
floating dust
mask
bicycle / cycle
cyclist
Suppose a sandstorm is coming, what else can we do
Close doors and windows tightly and stay inside
Leave dangerous old houses
Don’t attend open-air gathering
Keep away from high buildings and ad boards
Cover your mouth, nose and eyes when out and wash your face after back home.
land
desertification
Sandstorm is the result of desertification.
sandstorm
desert
Desertification is becoming a global problem.
causes:
measures to prevent it:
The Dust Bowl
bowl
The Dust Bowl in the 1930s in the USA
Then
It had been like this for 10 years
30 years after it ended, the land could be replanted.
Decide whether the statements are true (T) or
false (F). If it is false, say why.
1). The Dust Bowl in America in the 1930s was mainly caused by bad farming methods and years of little rainfall. ( )
2). Soon after the Dust Bowl, the land could be replanted. ( )
3). China has fought against desertification successfully. ( )
4). When a large part of agricultural land in Africa is becoming desert, people there can’t produce enough food for their population. ( )
T
T
F
F
1) In the history of the USA, the worst agricultural
disaster is called the Dust Bowl.
2) The Dust Bowl forced people to leave their farms.
3) The Chinese government is fighting desertification
by improving farming methods and planting trees
and grass.
4) The desert area in the world is spreading quickly.
5) In Africa, sandstorms are worse than anywhere else.
6) The desert in Africa is expanding because people
are destroying the tropical forests there.
The correct parts of the sentences are joined.
How Human Activities Affect the Earth
too many sheep and cattle
all the grass be eaten
grass never grow again ; the land become desert
trees be cut down
nothing to hold…
top soil be washed away…
Discuss the connections between:
Human activities
Losing top soil
Desert
Desertification
Sandstorms
Things we can do to protect our environment:
Plant more trees
Save water and paper
Use both sides of paper
Kick bad habits
Eat more vegetables
Live a low-carbon life
Save electricity
Recycle anything that
be used again
Don’t waste food or
clothes
Walk or use public
transport
Join an organization
(Earth Hour, Earth Day,
Tree-Planting Day …)
Thanks a lot.