Chp2-Improvements in Resource Conservation

Chp2-Improvements in Resource Conservation - about the...

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Are Natural Resources a Limit to Growth? Improvements in Resource Conservation o Modern cars have better gas consumption o New houses have better insulation and require less energy  to heat and cool them o Technological advances have also allowed us to access  resources previously thought to be too difficult to extract o Such advances have, for example, made it possible to  extract much more oil from the oil sands in Alberta than  once was thought impossible o Other technological advances have resulted in recycling,  causing some non-renewable resources to be reused o Finally, the development of alternative fuels, such as  ethanol instead of gasoline, allows us to substitute  renewable for non-renewable resources o Fifty years ago, some conservationists were concerned 
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Unformatted text preview: about the excessive use of tin and copper 1 Are Natural Resources a Limit to Growth? Improvements in Resource Conservation o At this time, these were crucial commodities: tin was used to make many food containers and copper was used to make telephone wire 2 Are Natural Resources a Limit to Growth? Improvements in Resource Conservation o Some people advocated mandatory recycling of tin and copper so that supplies would be available for future generations o Today, however, plastic has replaced tin as a material for making many food containers and phone calls often travel over fibre-optic cables, which are made from sand 3...
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