ENV100Y5 Lecture Notes - Lecture 29: Concentrated Animal Feeding Operation, Entomophily, Drip Irrigation

• School: UTM
• Department: Environment
• Course: ENV100Y5
• Professor: Barbara Murck

Document Summary

Chapter 8 - part 2. Tuesday, november 17, 2015. Large expanses of single crop types. Advantage:increases yields (planting & harvesting more efficient) Problem: reduces biodiversity (e. g. pollinators - depend on a variety of plant types to meet their needs) The green revolution (promised) involved increases in cultivated land. Not all farmers have access to land, training, credit, technologies, inputs. Small- scale (feed their families, not transporting food to everyone), subsistence farmers, women. Food production diverted to biofuel production. Biofuel - fuel derived from recently- dead biological material. Woodfuels, crop waste, energy- from- waste, etc. Usually from crops high in sugar or oils (e. g. us - corn or sugarcane for ethanol) Problems of extensification & intensification: livestock. Consumption of animal products increases with wealth. Much high animal production and use since before (doubled) Global per capita meat consumption has doubled since 1950. Report: livestock production accounts for 70% of all agricultural land & 30% of land surface of earth.