Heating with wood pdf epub mobi txt 电子书 下载 2024


Heating with wood

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发表于2024-11-25

Heating with wood epub 下载 mobi 下载 pdf 下载 txt 电子书 下载 2024

Heating with wood epub 下载 mobi 下载 pdf 下载 txt 电子书 下载 2024

Heating with wood pdf epub mobi txt 电子书 下载 2024



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Todavafter decades of wasteful use of fossil fuelsenergy<br > reserves have fallen to a crisis levelAt government urging<br > many dollars are being spent to develop alternative sources<br > of energyThe searchhoweverhas involved more than<br > looking for ways to harness the sunwindwaterand even<br > garbageIt has also led to a rediscovery of what our fore<br > bears knew as a matter of fact<br > Nature stores massive amounts of energy every year in<br > the form of wood<br > Our ancestorsviewing the sweeping forests of this conti<br > nentfound woodland and forest riches beyond belief<br > Demands of a growing nationhoweverled to masslve<br > assaults upon the virgin forests which had been thousands<br > of years in the makingTotal acreage of USforests fell<br > from 2 billion acres tO 800 million acres by 1900<br > World War I put massive demands upon our remaining<br > forestsand by 1920 forest fires were claiming 30 to 40<br > million acres annuallyFortunatelythrough fire control and<br > careful cutting and restocking of treesour forest reserves<br > have been rebuilt back to 765 million acres<br > Little of this wood is being used to heat the homes of<br >

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