ANBI 375.3 Study Guide - Comprehensive Final Exam Guide - Zoonosis, Zinc, Wood Preservation
20 Nov 2018
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Lecture 1: intro to domestic animal and the environment. The current human population of earth is 7. 6 billion and may reach 12 billion by 2100. Anthropocene: the current geological period (1760- present) that recognizes that during this period, human activities have had a signi cant global impact on the earth"s ecosystem. >50% of the world"s terrestrial surface is currently at least partly devoted to ag. uses. 1/3 of all workers on the planet are employed in ag. But ag. production accounts for <5% of the gross world product. 2008: grain prices increased 58% or more causing riots in 61 countries (drought, increased demand, biofuel production, trade restrictions) Lg. areas of earth"s ag. land is seriously degraded (around >40%) About 193492 farms in canada = decreasing dramatically. Meat production in canada (beef, hogs, veal, lamb) represent 27% of farm cash receipts. Positive and negative impacts of animal production with respect to the environment:
