ENV100Y5 Lecture 25: Agriculture and Biotechnology (continuation)
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ENV100Y5 Full Course Notes
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Document Summary
Monocultures: large expanses of single crop types, increases yields (planting and harvesting more efficient, reduces biodiversity (e. g. pollinators, less disease resistance. Green revolution: involved increases in cultivated land, not all farmers have access to land, training, credit, technologies, inputs, small-scale, subsistence farmers, women. Biofuel production: food production diverted, fuel derived from recently-dead biological material, woodfuels, crop waste, energy-from-waste, etc, usually from crops high in sugar or oils (e. g. , corn or sugarcane for ethanol, food-or-fuel controversy. Problems of extensification and intensification livestock: consumption of animal meat increases with wealth, global per capita meat consumption has doubled since 1950, livestock production accounts for 70% of all agricultural land & 30% of land surface of. Earth: the livestock sector emerges as one of the top 2 or 3 most significant contributors to the most serious environmental problems, at every scale from local to global. 70% of previously forested land in amazon is now pasture for livestock.
