Enst 201 Lecture 9 Outline of Last Lecture I Food Production II Pesticide Treadmill III I Green Revolution U S The obesity hunger paradox IV Threats to food security Outline of Current Lecture I Factors affecting food supply II What do we do Current Lecture I Factors affecting food supply a Climate change i Higher temperature near the equator is impacting grain yield ii Leading to more severe weather b Phosphorus i Rely on mining phosphorus from rocks ii Concentrated in certain areas around the world 1 Morocco dominates the phosphorus supply iii Algae can be used as biofuel but you need to use phosphorous c Water i Supply of freshwater is decreasing ii Inefficient usage and distribution These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute iii Rate of usage exceeds replenishing rate iv South East Asia and South Asia gets water from Himalaya 1 But glaciers are disappearing so the river and streams have slower rate of flow d Overfishing i Tragedy of the Common 1 Ocean is open access so there are problem with ownership and the managing of it is poor ii Dynamite fishing 1 Throw explosive into water and the fish will float to the top iii Blue Fin Tuna 1 Going extinct iv Very difficult to monitor the ocean e Human Population Growth i Puts pressure on food growth ii Forces us to find new ways to produce food f Desertification g Agriculture runoff causing dead zones h Ocean acidification i Putting more carbon dioxide into the ocean makes the water more acidic II What do we do a Recycling fertilizer like human waste b More efficient to eat less meat i Problem The opposite is happening ii As the middle class grows in like China and India meat consumption is increasing c Looking into alternative crops d Reduce food waste e Biotechnology i Taking genes and moving them sometimes species or even kingdoms ii Cons Why people are against it 1 Not natural People are creating new lives which disturbs some people 2 Allergens 3 Concern that large organizations could have power over GMO 4 Unknown impacts on the environment
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