San Francisco Telegraph May 2009
by Paul Niquette
| “That’ll be easy,” said I when
Joyce Leong invited me to write an entry about
‘sustainability’ for the SF Telegraph.
Joyce is the leader for All Things Green on Booz Allen
Hamilton’s team here at the Silicon Valley Rapid Transit
(SVRT) project. I was thinking that all I would
need to do is cite a few passages from the Internet
version of my book about the future A Certain
Bicyclist: An Offbeat Guide to the Post-Petroleum
Age. The hardcover version was
published in 1985 -- about the same time Al Gore began
holding the first congressional hearings on toxic waste
and global warming. Developing public awareness
for these problems has been slow; solutions, slower
still. The pace is accelerating, though, so maybe
writing this article won’t be so easy.
Since the middle fifties, my thoughtlife has been dominated by ‘non-replenishable natural resources’ – especially the fossils. I continue to be obsessed by `the noble substance’, petroleum (“nobody ever said the stuff will last forever”), leaving environmental concerns to other people. “Just think,” I have told countless audiences since the ‘50s, “it will be difficult to do much polluting in the Post-Petroleum Age.” ‘Carbon footprint’, however, is a different matter. For example, coal will continue in abundance, and coal-fired power plants are proliferating. Sure, that enables electric trains and trolleys to displace gas guzzlers and reduce congestion; however, coal is almost entirely carbon, making the concept of ‘clean energy from coal’ something of an oxymoron. SF Telegraph readers will doubtless prefer an article about green solutions not problems like that.
To make sure I am not too far out of date, I clicked up the ‘sustainability’ article in Wikipedia and found an immense subject. Still, the objective, living in equilibrium with the impoundment of solar energy (“equilibrating” was the word I have used since 1953), continues to be tyrannized by a harsh reality: Whatever its abundance, the sun's energy is spread out diffusely over the earth's surface. As I said in my chapter “The Perpetual Sun,” that amounts “to one calorie per minute per square centimeter -- at high noon, on a clear day, near the equator.” Today, green plants are increasing in popularity as nature’s marvels, each with a negative carbon footprint (in the daytime). They act as tireless automatons casting solar shadows and fixing atmospheric carbon – for their own benefit, of course, not ours. Still, without complaining, green plants take up water and nutrients from fertilized soil and manufacture replacements for themselves, while providing nourishment for various parasites including us. Green plants package up energy, too, as hydrocarbons. Only a fraction of that kind of energy comes from burning carbon, the rest comes from burning the ‘hydro’ part, producing water, which is not a greenhouse gas. That would be splendid but not exactly sustainable, it turns out. ‘Biomass’ must be harvested then processed into ‘biofuels’. That takes energy. Whereas some biofuels can act in place of petroleum in internal combustion engines for cars and buses and trucks, there is this one critical question: If it takes more than one unit of energy from either fossil fuel or biofuel to produce one unit of energy from biofuel, what’s the point?
For the most part, achieving
sustainability seems to take the form of individual
human endeavors in conservation, in recycling, in
changing life-styles. Advances in large-scale
energy technologies continue to be far-off and fraught
with political viscosity. Nevertheless, there
was one especially pleasant surprise for me and it may
be news for some SF Telegraph readers: For a
given amount of solar shadow, ‘photovoltaics’ are much
more efficient than green plants at the art of
converting sunlight to electrical energy. You
don’t have to irrigate and fertilize and harvest them
and burn their husks in a furnace. Manufacturing
solar cells does take energy and other resources,
including money, but once installed, they repay all
that and go on year after year supporting a truly
sustainable source of – pre-distributed! – power, all
without emitting greenhouse gases. As for costs,
silicon technology may be most famous throughout its
history for crashing through old ideas about economies
A coal-energized electric car has a larger 'carbon footprint' than a deisel powered SUV (work in process).