Originally Posted by rufnek
No, I'm not advocating unfettered CO2 emissions. And I've never heard anyone in the oil industry say anything of the sort. But CO2 is a natural element that has existed in our atmosphere long before fossil fuels and will continue to exist long afterward--if we're lucky. CO2 can be harmful to animal life in excess amounts, but plants thrive on it. Moreover, CO2 emissions from automobiles and factories have already been reduced much more than most people are aware. Air in the US is much cleaner than it was even 20 years ago, much less 40-50 years back. But pollution is removed at a cost. And removing the last 10% is much more difficult and therefore much more expensive than removing the first 90%. So at some point, it makes sense to ask if the benefits of removing that last 10% is worth what it will cost.
I wasn't saying you were advocating unfettered CO2 emissions, but the motivation for reduction may be key. Your focus seems to be on health-related air pollution, but as far as I'm aware, CO2 itself has never played a major role in damaging health (other than perhaps some isolated
cases where large quantities escaped from naturally sequestered sources and gathered in low lying concentrations strong enough to asphyxiate. Such incidents are an added worry for ongoing attempts at artificial sequesteration for 'clean coal' and the like).
As such i don't think the focus on pollution reduction has aimed at C02 until now, but rather emissions like carbon monoxide & particulate 'black soot' style components. No?
(Incidentally, although plantlife of course thrives in a C02 rich environment, in a warming world there are questions over the extent to which farming & biodiversity would benefit, given that reductions of arable land etc are expected via desertification & raised sea levels).
Originally Posted by ruf
I simply think people should know what they're getting vs. what they're giving up so they can make a knowledgeable decision as to what they want to do...
...There's the rub--it's an extremely complicated subject that a few people on each side want to reduce to simple terms and simplistic solutions.
Agreed, but your former wish becomes tricky to achieve if we include the latter in the equation. You could tell people, to pick one 'simple' strand, that excessive fossil fuel use could lead to a large drop in fish diversity (via temperature sensitive fish being out-competed by the likes of squid, & coral community collapse reducing foodstock for other species). Basically, you could say: Use too much gas, and you'll have to eat squid instead of fish. And that would be a simplification, but also one open to many variables. (Fish may actually adopt new breeding patterns &/or bounce back in ways we cannot predict outside the lab & historical records. Corals may share the heat-resistant symbiotes they need to survive such change faster in increasingly pressing conditions, or we could aid them in doing so. Etc.). So, the best we could say in this predictive field is: Use too much gas, and your descendants
may have to eat a lot more squid
(and put up with generally biodiversity-impoverished seas).
Just another example of the trickiness involved, if you buy into some of the greenhouse gas arguments. Which i do, but with a certain tentativeness.
Originally Posted by ruf
It's hard for me to believe that man is the main cause of pollution when a single volcano on any given day can puff more ash and chemicals so much higher in our atmosphere, keeping it airborne longer and with greater physical results than the operation of a million automobiles.
No one is claiming man is the 'main' cause of greenhouse gas pollution etc. The argument is more that we're adding additional emissions, which although minimal in comparison, seem liable to take us over certain climate-behaviour thresholds. It helps to bear in mind here that some C02 released hangs around for nigh on centuries, and it's this long-term cumulative effect that is a particular worry. (Unless we find methods for 'scrubbing' the 'excess' back out of the air, which is currently considered too energy-intensive to ever be viable).
Originally Posted by ruf
It's hard for me to believe that man knows enough about the earth and its environment to make sweeping judgements one way or another when Ben Franklin was the first to take scientic measurements of ocean temperatures, leading to the discovery of the Gulf Stream in the mid-18th century on his trips back and forth to Britain and France as representative of the United Colonies.
But didn't Franklin also give us the lightening rod, which mitigated a natural threat and has been saving untold lives ever since (once his personal publicity machine had overcome public & religious objection to messing with 'God's Wrath' that is
)
I'm certainly with you on the uncertainties thing, although i should point out that records do now extend back beyond the 18thC etc. To take the Gulf Stream example mentioned,
this study extends it back a 1000yrs or so for one region, thanks to animal remains in sediment. I don't provide it as cast iron proof, but more as one example of the scientific ingenuity that has given us a broad picture of past climate change etc (especially when multiple techniques are combined to try and remove erroneous results and technical shortcomings)
The area i'm more worried about is modelling of the future. On the plus side, current models, despite a variety of techniques employed, are now matching up with the strong records of the past 100yrs
and unified in a
prediction of 0.4C temperature rise over the next 20yrs. What worries me if anything is the unified results - not that a bit of certainty isn't welcome, but such unity in such a complex field leaves open the possibility that they've shared some techniques or assumptions that have brought their results together. If said issues are accurate, cool. But if they're not, we don't want a small subset of academic thought dictating our actions. (It happened to all the risk assessors in the financial field recently when they all started using the ''Gaussian copula" risk assessment technique, & hence introduced a new, unifying, unnoticed risk. The 'what if the model is wrong' risk
).
On these grounds, i take much of what they suggest seriously, but hold back reservation on any Herculean 'mitigation' suggestions, preferring instead to think of what are the least costly ways we could reduce greenhouse gases (& our potential risk here), & what aspects of change could we adapt to (IE issues that will be with us regardless, to varying degrees: the benefit of robust, drought-tolerant food sources, for example. Flood prevention etc).
Originally Posted by ruf
Oil sands and oil shales and lots of other unconventional fossil fuels such as coal-to-oil and coal-to-gas are competitive at prices of $65-70/bbl for conventional oil. For that matter, there are those who say it costs more in fertilizer, tractor fuel, planting, watering, harvesting, processing, manufacturing, and transporting crops into ethanol than the resulting amount of energy is worth. The difference is that the oil companies for 30 years have been putting their research dollars into oil sands because of the huge resource out there while the government at the urging of the farm lobby and representatives from farm states has been putting your tax money into subsidies for turning corn into ethanol only to find out it drove up the cost of food in the process.
Heh, you've just described the worst nightmare of a climate change 'advocate' with coal-to-oil
. Rising oil prices certainly do make it viable, but on a C02 emission level it's a bitch (and all the more worrying because plenty of us non-Saudis have plenty of it lying around).
As for corn-ethanol, hell, i've always assumed it could only have been lobbying & pork-barrel scratching that got that off the ground. Most sci-journalism i read prior to its adoption was saying it's a foolish idea for all the obvious reasons. (Of course high oil prices also played a role in the food shortages that followed, and most other biofuels will be at the mercy of similar concerns, given the energy-intensive nature of modern farming). Brazil's cane-ethanol seems to be slightly more economical than corn (in terms of energy-extraction levels for a start), but is somewhat of a specialist case. Not everyone has the right environment to produce that particular fast-growing grass, for a start.
Originally Posted by ruf
Reminds me of that silly film some years back with that silly Kung Fu Caucasian in which Michael Caine played this evil oilman in Alaska who purposely buys inferior equiptment that results in a massive blowout, spilling barrels of oil that he otherwise could have sold at market for a good price. The good guy retaliates by blowing up a refinery to save the earth--a real smart environmental solution.
That is a marvellously silly film. But Steven Seagal is surely a strawman ecologist in this case. His gassy conflagrations are not where the argument is at. (Though lord knows, if any sides of the debate ever do descend to podgy acts of kung fu, all reasoned discourse will truly have abated
)