“The best is the enemy of good.” – Voltaire
Good news travels slowly, if at all. Given headlines of the century you might think that good news does not exist. A newspaper will not stay in business without readers—and they need drama to get readers—so even good news often gets described as bad news.
At the risk of biting the hand that nourishes me, here is a pretend headline from real data to show you how it works: “Rate of cancer deaths no longer falling rapidly for women.” Note that the rate is still falling and certainly not rising; it just is not falling as fast for women as it is for men. (By the way, deaths from cancer are much lower for women.) The point is that news outlets do not make money on cheery stories.
Since good news gets downplayed you may have missed a story about a drop in carbon-dioxide outputs in the United States. Why is a lowered CO2 output good news? Because CO2 is a greenhouse gas that most climatologists agree contributes to the warming of the earth, lowering CO2 then is thought to lower the risk of catastrophically heating our planet.
Skeptical Environmentalist, Bjorn Lomborg wrote about the drop in CO2 output, “Carbon-dioxide emissions in the United States have dropped to their lowest level in 20 years….The reduction is even more impressive when one considers that 57 million additional energy consumers were added to the US population over the past two decades. Indeed, US carbon emissions have dropped some 20% per capita…”
To achieve a 20 percent drop in CO2 emissions, we must be using more energy produced by renewable resources, such as wind, solar, and hydro, and burning less fossil fuel right?
No, but given public discussion, it is easy to see why one might think that. After all, we hear that renewable energy is essential to preventing catastropic climate change.
“[T]he numbers clearly say otherwise,” wrote Lomborg. Renewables need backups because the wind does not always blow nor does the sun always shine. Consider “Denmark,” wrote energy expert Robert Bryce, “the poster child for wind energy boosters, more than doubled its production of wind energy between 1999 and 2007….[Yet] carbon dioxide emissions from electricity generation in 2007 were at about the same level as they were back in 1990, before the country began its frenzied construction of turbines.” And, Denmark’s population has not really increased, whereas the US population has grown 24 percent.
Not everyone cheers our achievement. Why not? Partly because we are still among the highest per capita emitters in the world and partly because of how we did it. We did it the old-fashioned way—we burned it.
The US is substituting cheaper natural gas instead of coal to generate electricity and some environmentalists have problems with that: 1) the way natural gas is extracted from the ground and 2) natural gas is still a fossil fuel.
First, the way natural gas is taken from the earth uses a process called hydraulic fracturing (also known as “fracking”). Fracking has been around for sixty years; but has become more sophisticated in the last ten years. Water and chemicals are forced at high pressure to break up rock formations that hold natural gas in the earth. In a few cases, hydraulic fracturing has contaminated groud water supplies.
Second, burning natural gas to power electric generators is not free of CO2 emissions, just fewer. Burning natural gas releases about half the carbon dioxide that coal does. Using natural gas instead of coal has lessened other pollution as well. By using natural gas we are NOT sending tons of radioactive substances along with mercury into the air that burning coal would.
Robert Bryce sums up the choice to burn fossil fuel this way: “(Our political leaders) want to replace high power density sources that are dispatchable, reliable, and relatively low cost with low power density sources that are not dispatchable, highly variable, and high cost. This makes no sense. I’d call it insane but it’d be an insult to crazy people.”
Remember, “The best is the enemy of good.” Natural gas may not be the best solution to our power needs. But, for the moment, it is certainly better than others and not crazy.
Bryce, R. (2010, April 25). Five myths about green energy. Retrieved April 25, 2010, from WashingtonPost.com: http://www.washingtonpost.com/wp-dyn/content/article/2010/04/23/AR2010042302220.html
Hvistendahl, M. (2007, December 13). Coal Ash Is More Radioactive than Nuclear Waste. Retrieved Ocotber 19, 2012, from Scientific American: http://www.scientificamerican.com/article.cfm?id=coal-ash-is-more-radioactive-than-nuclear-waste
Lomborg, B. (2012, September 13). A Fracking Good Story. Retrieved September 13, 2012, from project-syndicate.org: http://www.project-syndicate.org/commentary/a-fracking-good-story-by-bj-rn-lomborg
National Cancer Institute. (2012, March 28). National Cancer Institute. Retrieved October 19, 2012, from Report to the nation finds continuing declines in cancer death rates since the early 1990s: http://www.cancer.gov/newscenter/newsfromnci/2012/ReportNationRelease2012
- Ignoring ‘Fantastic Opportunity’ of Gas Is Foolish: Lomborg – Bloomberg (bloomberg.com)
- A fracking good story (eco-business.com)
- Fracking is by far the best green-energy option of the decade (dailystar.com.lb)
- Economist: Ignoring ‘fantastic opportunity’ of gas is foolish (fuelfix.com)
- An economy awash in oil (macleans.ca)
- A Fracking Good Story (slate.com)
- U.S. Carbon Dioxide Emissions at 20-Year Low Thanks to Fracking (reason.com)