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yui wong

on 28 October 2014

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World population expected to plateau at 9 billion in 2050
Studies show that we need to produce 70 to 100% more food by 2050
We need to produce more sustainable crops
Food Security: The Challenge of Feeding 9 Billion People
what is “
yield gap

Closing the Yield Gap
Disadvantage of GM Food:
Genetic modification involves many manipulations, its safety issues needs to be assessed.
Acceptance of Biotechnology?
H.Charles J.Godfray, John R.Beddington, Lan R.Crute,Lawrence Hadded, David Lawrence,James F.Muir,Jules Pretty,Sherman Robinson,Sandy M.Thomas, and Camilla Toulmin
Changing Diets
Low yields may exist…

technical constraints

high costs of inputs

low returns from increased production

Closing the yield gap would dramatically
the supply of food

Food production
:effects on the environment or economy that are not reflected in the cost of food.

Environmental pollution
nutrient run-off, water shortages, soil degradation and the loss of biodiversity…

Reducing the consumption of meat
Substitutes For Meat
Eating Insects
H C J Godfray et al. Science 2010;327:812-818

To address these negative effects :


The Green Revolution
Reducing Waste
Increasing Production Limits
How can we increase the limits?
More efficiency
Less labour needed
Transport improvement

Increased cost
Possible environment degradation
Approximately 30 to 40% of food wasted
Lack of proper storage and knowledge in developing countries
Food is too cheap and accessible in developed countries
Best before dates lead to throwing out food before it is actually bad
Present by: Weiwei W, Ole O, Zehua C, Qiana Y
Proper storage and knowledge needed in developing countries
Increase in food prices in developed countries
Genetically Modified (GM) crops
Resistance of a gene inserted (drought tolerance)
Increase the efficiency of meat production and lower methane emissions
Reduce substantial losses arising from mortality and infections
Would you be willing to eat insects?

What are some practical ways to reduce food waste at the retail and individual level?

Based on what we have been presenting, will you be able to accept GM food in future? Why?

How many challenges involved in feeding 9 billion people did we present?
Examples of current and potential future applications of GM technology for crop genetic improvement
Writer's View:
GM is a potentially valuable technology whose advantages and disadvantages need to be considered rigorously on an evidential, inclusive, case-by-case basis.


how to solve those difficulties
good effect
biggest problem
(2014). Retrieved from http://www.republicofbacon.com/wp-content/uploads/iStock_000003563675XSmall-200x300.jpg
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(2014). http://www.ville.kirkland.qc.ca//client_file/upload/image/dev%20durable.png.
(2014). Retrieved from http://www.celkau.in/Crops/Cash%20crops/sugarcane.aspx
Alford, J. (2014, August 28). Will We All Be Eating Insects In 50 Years? Retrieved from iflscience: http://www.iflscience.com/environment/will-we-all-be-eating-insects-50-years
AsapScience. (2014, June 24). Should We All Be Eating Insects? Retrieved from YouTube:
H. Charles J. Godfray1, J. R. (2010). Food Security: The Challenge of Feeding 9 Billion People. Science, 812-818.
H.Charles J.Godfray, J. R. (n.d.). Food Security: The Challenge of Feeding 9 Billion People.
Sugarcane. (n.d.). Retrieved from http://science.howstuffworks.com/life/botany/sugarcane-info.htm
The Green Revolution. (2014). Retrieved from http://mindworkzz.in/green-revolution-2.aspx
What is the Green Revolution? (2014). Retrieved from http://www.coolgeography.co.uk/A-level/AQA/Year%2012/Food%20supply/Managing%20food%20supply/Green%20Revolution.htm
Sustainable Development
For poorest countries:

The lack of secure land rights can be a particular problem for many poor communities
Fig. 2 An example of a major successful sustainable agriculture project.

The Green Revolution
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