Answer to Question 1
This probably occurred because of the cost of transportation, which was greater
for steel cans, and because steel cans changed the taste of beer (and presumably other
drinks, though it was less obvious). The beer bottlers adopted aluminum cans and because
of economies of scale, other bottlers did as well.
Answer to Question 2
The residue, if left in place, can contribute to soil fertility. Retention of organic
matter enhances subsequent productivity. Removal of all ground cover, characteristic of
clearcutting, can have adverse effects on the soil and hinder reestablishment of the local
ecosystem.
In Charles Russell’s Trail of the Iron Horse (1910) steel rails stretch nearly to the sun while wisp
The energy set-point view that is the basis of many people’s thinking about hunger and eating.
Kyo and jitsu-concept of energy deficiency and excess from shiatsu.
The energy cycle of life
Solar energy heats the atmosphere, creates seasons, and causes air to circulate
A cowbird with its foster parent. A female cowbird minimizes her cost of parental care by laying her