For there is hope of a tree, If it be cut down, That it will sprout
again And that the tender branch Thereof will not cease. Job XIV (7)
Mankind has been blessed with a multitude of resources. In the beginning
he utilized almost soley replenishable items such as vegetation and
animal protein, for both nourishment and shelter. Gradually, such metals
as copper and iron were developed and replaced wood as a material of
construction. Cement and glass, although more plentiful than other
minerals, also replaced the use of growing sub- stances. Coal and oil
became the primary sources of heat and power. Closer to the focus of
this book, petroleum products began to replace the vegetable oils,
tannin, wool, cotton, leather, silk, rubber, etc. in a host of
applications. Surely, it was argued, the new materials did the job
better and cheaper. What they didn't say is that soon we would run out
of oil. In any case, research on growing natural products, now called
renewable resources, slowed, and these industries sought only to
maintain their status quo. The 20th Century saw an unprecedented
emphasis and dependence on nonrenewable resources as energy sources
(petroleum, coal, ura- nium) and the fabric of technology (drugs,
clothing, shelter, tires, computer parts). The predawn of the 21st
Century brings a reali- zation that a cyclic shift back towards the use
of renewable re- sources for technological application is in order.