Readers dispute the math, but not the impact of idling engines on environment

Q: A gallon of gas burned puts over 26 pounds of carbon dioxide into the atmosphere, not 20, as a reader stated earlier this week. I think all high school chemistry teachers should have students make this calculation.

All you need is the formula for gas (C8H16), its density (73% that of water), first chemical principles involving molecular weight, and liter-gallon conversion.

John Antoun

A: Yours was one of several responses I got on that.

Q: Mr. Ortendahl claimed that burning a gallon of gasoline released 20 pounds of carbon into the atmosphere. Instead, it’s 20 pounds of carbon dioxide released.

I am whole-heartedly in favor of his point about better light timing. Any engine idling creates unnecessary pollution.

Luther Abel, Alameda

A: And…

Q: There are 5.5 pounds of carbon in a gallon of gas. After combustion, 20 pounds of carbon dioxide are emitted. Smarter lights would still make a huge difference. Why are we not seeing them? The technology has been around for a long time and is getting better.

Niall MacDonagh, Antioch

A: And…

Q: Mr. Orthendahl is correct to say that 1 gallon of gasoline could produce up to 20 pounds of carbon dioxide (CO2) gas when the carbon combines with oxygen.

This doesn’t take away the merits of his suggestion that smart traffic lights would save fuel and time.

Sandra Adams

A: The answers from those correcting the calculation varied from 20-26+ lb. of carbon dioxide and 5.5-7 lb. of carbon per gallon of gas burned. His overall point, though, was not challenged, that a lot of carbon dioxide and carbon spew into the air with each gallon of gas burned, and idling causes a lot of it.

Q: When I lived in a small Connecticut town 60 years ago, we had one traffic light. If it was red when you approached and if nothing was coming the other way, it changed to green.

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𝗖𝗿𝗲𝗱𝗶𝘁𝘀, 𝗖𝗼𝗽𝘆𝗿𝗶𝗴𝗵𝘁 & 𝗖𝗼𝘂𝗿𝘁𝗲𝘀𝘆:
𝗙𝗼𝗿 𝗮𝗻𝘆 𝗰𝗼𝗺𝗽𝗹𝗮𝗶𝗻𝘁𝘀 𝗿𝗲𝗴𝗮𝗿𝗱𝗶𝗻𝗴 𝗗𝗠𝗖𝗔,
𝗣𝗹𝗲𝗮𝘀𝗲 𝘀𝗲𝗻𝗱 𝘂𝘀 𝗮𝗻 𝗲𝗺𝗮𝗶𝗹 𝗮𝘁

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