Thursday, February 21, 2008

About that Carbon Issue

I have worried about many unanswered questions on the concept of a "carbon footprint." Today's New Yorker offers a great deal of enlightenment -- it's long but really worth reading: Big Foot: In measuring carbon emissions, it’s easy to confuse morality and science, by Michael Specter February 25, 2008.

Here are a few of my favorite quotes:
"We all consume electricity generated by burning fossil fuels; most people rely on petroleum for transportation and heat. Emissions from those activities are not hard to quantify. Watching a plasma television for three hours every day contributes two hundred and fifty kilograms of carbon to the atmosphere each year; an LCD television is responsible for less than half that number. Yet the calculations required to assess the full environmental impact of how we live can be dazzlingly complex."

"Sea-freight emissions are less than a sixtieth of those associated with airplanes, and you don’t have to build highways to berth a ship. Last year, a study of the carbon cost of the global wine trade found that it is actually more 'green' for New Yorkers to drink wine from Bordeaux, which is shipped by sea, than wine from California, sent by truck. That is largely because shipping wine is mostly shipping glass."

"The environmental burden imposed by importing apples from New Zealand to Northern Europe or New York can be lower than if the apples were raised fifty miles away. ... the yield of New Zealand apples far exceeds the yield of those grown in northern climates, so the energy required for farmers to grow the crop is correspondingly lower. It also helps that the electricity in New Zealand is mostly generated by renewable sources, none of which emit large amounts of CO2."

"According to the latest figures, deforestation pushes nearly six billion tons of CO2 into the atmosphere every year. That amounts to thirty million acres—an area half the size of the United Kingdom—chopped down each year. Put another way, according to one recent calculation, during the next twenty-four hours the effect of losing forests in Brazil and Indonesia will be the same as if eight million people boarded airplanes at Heathrow Airport and flew en masse to New York."

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