Read e-book online Constructed climates : a primer on urban environments PDF

By William G. Wilson

ISBN-10: 0226901475

ISBN-13: 9780226901473

As our international turns into more and more urbanized, an realizing of the context, mechanisms, and outcomes of urban and suburban environments turns into extra severe. and not using a feel of what open areas equivalent to parks and gardens give a contribution, it’s tough to argue for his or her construction and upkeep: within the face of colleges wanting assets, roads and sewers wanting upkeep, and other people anguish by the hands of others, why may still towns and counties spend scarce money planting timber and holding parks?

           

In Constructed Climates, ecologist William G. Wilson demonstrates the worth of city eco-friendly. Focusing in particular at the position of plants and timber, Wilson indicates the prices and merits reaped from city open areas, from cooler temperatures to raised caliber floor water—and why all of it concerns. whereas Constructed Climates is a piece of technology, it doesn't forget about the social part. Wilson appears to be like at low-income parts that experience terrible plants, and indicates how improving those parts in the course of the planting of neighborhood gardens and timber can alleviate social ills. This booklet may be crucial examining for environmentalists and an individual making judgements for the character and health of our towns and citizens.

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2007). CHAPTER 1. CITIES AND NATURE 17 Are cities stealing farmland? 1. 7, however, make it clear that the United States gained people and converted land to urban use. Our urban sprawl problems likely originate from the situation underpinning the quarter-million dollar break-even value shown at the bottom right of the figure. 1 million. The average farm size remained constant at 440 acres, but that constant hides change. Intermediate-sized farms between 180 and 500 acres decreased from 616,000 to 389,000, but small farms less than 50 acres increased from 507,000 to 743,000, and 1000+ acre farms increased from 155,000 to 177,000.

28 This level provided about 400 g/m2 yield gain, or 63 bushels/acre. At $3/bushel for corn, the economic benefit reaches $190/acre, a return of about $5 for every $1 spent. A farmer planting 1,000 acres of corn needs that $200,000. 5. 30 The resulting high-efficiency farming methods prompted the land-use changes shown next. 16 CHAPTER 1. CITIES AND NATURE Urban land use grew as small farms disappeared. 7: Despite a much larger human population needing food, the last half of the twentieth century in the United States saw agricultural land use decreasing by about 75 million acres while urban land use tripled, increasing by about 50 million acres (data from Lubowski et al.

The curves show little difference (dark sits on top of gray), meaning the UHI didn’t cause the measured temperature increase over the last half century (after Peterson and Owen 2005). CHAPTER 2.

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Constructed climates : a primer on urban environments by William G. Wilson


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