6. Benefits
Benefits Problems
Longer growing season in rich agricultural areas such as
Europe and North America will increase food production
Increased food production could get some countries’
economies stronger and increase global trade.
An additional 220-240 million people may be at risk from malaria
particularly in China and central Asia. Tropical diseases in Africa
likely to spread to North of continent
The diseases will slow down countries’ economies and could
spread and cause real damage to the end of the world
Energy consumption may go down as temperatures increase in
densely populated parts of the world such as north-west Europe
Higher sea levels may flood low-lying areas such as Bangladesh
and the Netherlands, threatening the lives of millions
Frozen regions of the world such as Siberia and northern
Canada may be able to grow crops in a milder climate
These regions will be able to trade more and be more
self-reliant.
Loss of glaciers (fresh water) in the Himalayas may threaten
agriculture and water supply in India, Nepal and China.
Canada’s North-West Passage may become ice-free and can be
used by shipping
Some species, whose habitat changes, may become extinct – there
is considerable concern about polar bears in the Arctic
Some species becoming extinct can endanger other as I
disrupts the food chain which can link in to human
agriculture.
Editor's Notes
Welcome to my presentation on Global Warming
Constantly, the earth is warmed by the sun through short wave (insolation) radiation. During the night the earth loses heat due to outgoing infrared radiation. Over a long period of time due to the balance between ingoing and outgoing radiation the earth’s temperature remains constant.
From the graph we can see that sea levels have been rising for a long time at a steady increase since 1970 .at around 1900 there was heavy industrialisation throughout the world which would suggest that human presence and activities could cause sea levels to rise.
We know the global sea level is rising because of the greenhouse gases trapping the earth’s heat and increasing he temperature and in some cases melting arctic ice and glaciers which makes the sea level rise. Another problem with the earth’s temperature rising is that when the sea is warmer it expands (thermal expansion)
