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Thesis - It will be challenging to feed future global populations (Climate…
Thesis - It will be challenging to feed future global populations
Climate Changes
Causes of climate change
Global warming
Changes to long term av temps, cooling
Changes to rainfall pattern, when it falls, how long it falls for
Changes growing seasons
Greenhouse effect
water vapour and carbon dioxide lets sunlight in but traps heat in the atmosphere.
The burning of fossil fuels produces more carbon dioxide
water vapour, methane and carbon dioxide
Without these gases, too much heat would escape, allowing some shortwave radiation to get through
human activity is releasing too much GH gases. This traps too much heat, heating up the earth. This causes climate change.
Changes in the atmosphere
Greenland, antarctica
melt ice and glaciers, causes sea level to rise and causes flooding
hazard intensity
Droughts, cyclones
Growing Regieons
Desertification
Land degradation
Loss of fuel
Water holding
Impacts
1/6 countries are affected.
23 hectares of land is lost every minute
2/3 of the agricultural land is lost in Africa
Reduced amount of land
Acts of controlled farming must happen
Desertification can spread easily
Causes
Climate change
Erosion
Agricultural practices
Overgrazing
over-withdrawal of water
Deforestation
Population growth
Fast increase of 1.1% per year
By 2050 it is estimated that the population will grow to 9 billion
in the year 1800 there was only 1 billion, although this increased abundantly
Causes
Less economically developed people
Increased fertility
not much access to contraception or abortion, birth control etc
lack of education, not much knowledge about using contraceptions
Cultural beliefs, religion
Gender Inequality
The girl’s status in cultural groups is lower, so they cannot provide an opinion to when they will have children etc
For some cultures( e.g. India), parents may stop having children until they have a male child( as male children are thought to provide more for the parents).
Increase life span of people through the advancing modern techology
Impacts
More people to feed
Birth rates are seen to be higher in less developed countries in comparison to higher developed countries
more children may be wanted, due to the fact the status of the family would increase