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50 Conservation of Natural Resources The " greenhouse effect " fuels ,
atmospheric carbon dioxide levels have increased steadily since 1900 , and the
rate of increase is accelerating . Now the output of carbon dioxide is believed by
some to ...
106 Consumption , Economic Table 4 : Percentage Increases in the Volume of
Private Consumption per Person ... is defined as the percentage Development ,
National Accounts Statistics 1950–1968 : United increase in expenditure on food
Population increases usually followed , • railroad development effects 15 : 480f
systems approach to long range goals 17 ... 4 : 660a increase 18 : 940a the New
World the earliest known urban cendeath's emotional response factors 5 : 528f ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review