
Monday, July 16, 2007
China: general impressions

Friday, June 15, 2007
What I used to be listening to
Lady Genius
Sparklehorse
'07 Spring picks:
Volunteer Pioneer
My Morning Jacket
Seu Jorge
Wolf Parade
'06 Winter Picks:
The New Pornographers
Neutral Milk Hotel
The Mars Volta
The Magnetic Fields
Devotchka
Thursday, January 11, 2007
Climate Change Primer
CiHjOk + (−k/2 + i + j/4)O2(g) → iCO2(g) + j/2 H2O(g)

While it is clear that we are impacting our climate on an enormous scale, the consequences are not all known or universally accepted; the global warming debate is much more complicated than the climate change debate. Global mean temperature records in figure 2 show a striking correlation–increasing temperatures over the same period of increasing GHG concentrations, though including a dip in temperatures in the 1970’s due to global cooling from particulate emissions. The temperature increase of about 1°C over the last 100 years may not sound like much, but only about 8°C separates the hottest recorded years in history with the depths of the coldest ice ages.

Global temperatures fluctuate periodically, and the next figure shows that the correlation between GHG concentrations and temperatures holds remarkably well for the last 400,000 years. The figure also shows that the earth is now hotter than it has been for the last 100,000 years and near the hottest temperatures recorded on earth for the last 400,000 years. Current greenhouse gas concentrations are higher than ever recorded, with methane, a particularly important greenhouse gas,at more than twice its record high.

The vital questions are: 1) as we continue to emit GHGs, what are the effects to our climate? 2) How can we adapt to or mitigate the consequences of projected increasing GHG emissions?

Some consequences of GHG concentrations are known to have an effect on the environment, but it is not known if the feedback loop is positive (reinforcing the trend of warming) or negative (pushing back, and cooling the climate). Examples include clouds: warming increases evaporation and thus cloudiness; it is not known whether clouds will increase temperatures by blocking in heat (water vapor is also a GHG) or decrease temperatures by increasing albedo.
The unintended and unknown consequences of climate change could potentially become the worst. Until several years ago, the major heat flows around the world were not understood, and the importance of the slowing of the vital Thermohaline Circulation was not understood. We now know that this ocean current keeps Northern Europe 20 °C warmer than other locations at the same latitude, and as a warming earth shuts down the THC, Northern Europe may quickly resemble Newfoundland. Before literally watching a glacial ice shelf melt in weeks in 2002, we didn't understand how quickly the ice could melt.
A prudent policy would take into consideration major threats due to climate change. What are the consequences of a Katrina every decade or every year? If global sea levels rise quickly, major population centers will be displaced and buildings will be lost.


Market-based solutions such as cap-and-trade systems or taxes on negative externalities have solved similar problems. To deal with acid rain, a cap-and-trade system was implemented for SOx and NOx emissions at less than one quarter the projected cost.
Increased funding for research may lead to the much talked about "technological fix.'' Rather than lag behind, if the US takes the lead on global initiatives on GHG emissions, we can create incentives for R&D to solve major problems in the field, and US firms can become leaders in the industry. If we continue to elect leaders who not only drop the ball but kick it farther away, we will fall further behind in important future industries, just as US car makers fell behind Japanese firms as fuel efficiency became more of a factor in the last several years.
Thursday, December 28, 2006
Livestock's Long Shadow
The argument goes as follows: getting your calories from meat is much more energy intensive than getting the same number of calories from plants. Because animals need to breathe, move a little, chat, or whatever else they do to pass the time while they get fattened and prepare to meat their maker, they are inefficient converters of plants into protein. After you consider all the methane released in cow farts, the energy it takes to fatten a cow, move it to the slaughterhouse, cut out the bones and fat and skin, package the meat, and get it to the grocery store, you've released 10 times as many greenhouse gasses as if you'd just eaten the corn yourself and skipped the middle-pig.
The NY Times article doesn't touch energy issues, it addresses health. In notes the twin key trends over the last 30 years: 1) people have become increasingly health- and diet-conscious, leading to a proliferation of health foods and nutritional products and 2) people have become less healthy, more prone to diabetes, fatter, more oft-stricken by heart attacks. The recommendations made are essentially to eat less, eat unprocessed food (produce), and eat less meat.
If you aren't yet concerned about eating meet, check out the webiste www.goveg.com, which, while a little heavy-handed, may give you second-thoughts next time you buy a sausage.
Finally, I'd like to argue the 80% case: even meat lovers can stand to eat less meat. The average American diet includes far more protein than is necessary or healthy. So if going "whole hog" is too much to ask (it is for me), try to become an 80% vegetarian. Or any percent vegetarian. Every so often, try to order something without meat when you would have otherwise gotten meat.
Saturday, November 25, 2006
How We Are Hungry
As past readers may have discovered, this blog will be primarily concerned with energy: alternative energy, technology, and energy conservation and efficiency. It will address the climate change "debate". Such blogs can hopefully increase the awareness of the problems resulting from future climate change as well as some easy things we can all do to help in mitigation. I will highlight the degree of consensus among scientists that global warming: is happening, is caused by humans, and will harm us in the future. Such publicity is important as the public perceives there to be disagreement on this issue, and criterion for political action include
- awareness
- consensus: if the situation is complicated, voters need to at least believe that the experts agree
- efficacy: a feeling that by acting, we can improve things
So, I hope to keep writing about these issues, and I hope you'll keep reading up on them. After all, it is hard to open a newspaper these days without seeing stories about energy. We clearly reached a tipping point in the last year, energy is no longer a fringe issue. Let's keep up the momentum.
Vampires that suck us dry at night
To some energy wonks, this is a well known problem. There was some attention devoted to it during the blackouts in NY, including a NY Times article and an appleal by Mayor Bloomberg to conserve. There is a contest for copy machines that use the least amount of power when on standby. And one fantastic suggestion by another blogger is that Microsoft set all its machines to default to the highest energy saving mode, thereby saving the an estimated 45 million tons of CO2 emissions per year. But for most of us, this problem is not high on our priority list.
Since energy efficiency and conservation should be a high priority, what are some steps we can all take? Here are a few cloves of garlic to keep the vampires away:
- Set your computers to power saving modes that turn off the display and harddrives after some idle period
- Turn off lights and devices when not in use. Weren't we all taught this as kids?
- When possible, unplug things when not in use. Phone chargers, IPod docks, and laptop power adapters don't suffer when they are unplugged
Saturday, November 11, 2006
Bikers: friend or foe?
There was much subsequent debate on whether he did the study correctly, etc. Even if we assume he was correct, the choice becomes: bike and live longer or drive and die young. I think the answer is obvious.
Another interesting conclusion is that the worst people, in terms of pollution, are those who exercise but don't cycle. They will drive, thereby polluting, and live longer, thus polluting more.
While I'm at it, I'd like to share a real-world biker vs. driver confrontation. I was on one of my favorite rides, involving climbing, descending, rolling hills, forests, lakes, fellow cyclists and the usually very polite drivers. On a technical descent with no shoulder, a driver started tailgating me, honking several times. We were going about 40 in a zone marked with "caution 25mph" signs, and I was busy trying not to die, so I didn't pay too much attention to the impatient driver behind me. Usual protocol is to wait for a safer place to pull to the side and let the driver past. This lady didn't give me time to do that and practically brushed me as she ripped past my in a steep curve with cars coming up the other side. As she did so, she gave a blast of the horn that nearly scared me off the side of the cliff. My cycling friends will not be surprised to hear that she was driving a SUV--experienced cyclists are well aware of the correlation between car size and jerk-to-cyclist. At the end of the descent, I caught up to her at a stop light, pulled next to her, and motioned for her to roll down the window. Most drivers in this case ignore me, so I have to decide between doing something violent to their car, yelling, and fuming silently. Luckily, she obliged me and rolled down her window.
"Do you realize you almost killed me, and didn't save any time? What were you doing on a Saturday that you'd risk manslaughter to try to save a minute or two?"
"You didn't pull over to the shoulder."
"There wasn't a shoulder. It's just like going uphill behind a truck--you just have to go slower until I can pull over."
"But you didn't pull over to the side."
"Haven't you ever heard the phrase 'share the road'? That's because roads are built for bikes and cars."
"Well, not bikes."
The light turned and she drove off, undoubtedly thinking she was right all along.
Thursday, November 09, 2006
CA Voters Say, "Tax Grandma, not Exxon"
Big Tobacco splashed out $55 million on the fight against Prop. 86, which would have taxed cigarettes to fund hospitals, tobacco-use-prevention programs, and cancer research. It appears the days are over when major tobacco companies were hauled to Washington DC and made to pay $200 billion.
While voters declined taxes of $4 billion over the next 10-20 years on oil companies that earned $286 billion last year and are set for another record year, they passed Propositions 1A, 1B, 1C, 1D, and 1E, that will cost taxpayers an estimated $74 billion.
These results are a boon to the Economics professors, who have been provided with a textbook example of revealed preferences to use in classes this year. Despite all the talk of climate change, including Britain’s headline-grabbing Stern Report on climate change and Al Gore’s movie An Inconvenient Truth, even relatively progressive Californians aren’t prepared to put their money where their mouths are: guzzling gasoline at the pump.