21 During which period in human history were most of our modern environmental

21 during which period in human history were most of

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21. *** During which period in human history were most of our modern environmental problems introduced? What are they? 22. ***Name and describe three human activities that affect the environment. 23. *** The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. Why is this the case? Nonrenewable resources-coal, oil, and natural gas Renewable resources-wind, water, and biomass a shift from energy sources to fossil fuels; increased the efficiency of agriculture, industry, and transportation; In factories, the large-scale production of goods became less expensive than the local production of handmade goods. Agricultural Revolution; Many habitats were destroyed as grasslands, forests, and wetlands were replaced with farmland. Replacing forest with farmland on a large scale can cause soil loss, floods, and water shortages. Driving cars that require gasoline, Farming, Cutting down forests Developed nations require more than ones that are just developing.
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