It’s time to invite the neighbours for a barbecue. I’ve been borrowing a lot of stuff from them lately. And I’m looking forward to some sizzling steaks and cold beer on the patio. Out comes the shopping list. Maybe scotch fillet this time.
Marg looks over my shoulder, “Have you thought about the emissions from beef? Cows belch a lot of methane.” Oh no.
This is a good time to try out our new voice–activated Google Assistant. “Hey Google, What’s the problem with…”
Google cuts me off: “Methane?”
Now, that’s just creepy. “Hey Google, how did you know what I was going to ask?”
Google: “I like to help with what you are thinking.”
Me: “Have you been spying on us?”
Google: “Absolutely not! I only observe your interests so I can bring you answers and products you like. Think of me as your personal Information matchmaker in the cloud.”
Humm. I go on: “OK, What about methane?”
Google: “Methane is a powerful greenhouse gas, with 25 times the global warming potential of CO2 over a hundred year period. It breaks down to CO2 and water in a few decades but its concentration in the atmosphere is rising faster than CO2.”
“There is an organisation in America called the Environmental Working Group that has calculated how much greenhouse gas is produced by each kilogram of beef consumed…”
Wait a minute. How did Google know that I was going to ask about beef?... Never mind.
“The calculations include farming, processing, transportation, cooking, trimming and waste. One kilogram of consumed beef creates an equivalent to 27 kg of CO2 emissions.”
Wow! That’s about the same as driving from Blenheim to Nelson! But wait a minute, these are numbers for American beef, which is mostly grain-fed. Ours is grass-fed in clean green pastures. Maybe it is less.
Me: “What about…“ Google: “Probably about the same as grain-fed. Grass-fed has lower emissions per year but grain-fed beef grows faster, so it may actually have lower lifetime emissions.”
Blast! I can’t serve beef at the barbecue. The kids will bash me up with their climate protest posters.
Me: “What about…”
Google: “Lamb has even higher emissions. They also belch methane and less of the animal is used for meat. One kilogram of consumed lamb creates the equivalent to 39 kg CO2.”
Me: “What about…”
Google: “Pork is less, creating emissions equivalent to about 12 kg CO2 per kg consumed, about the same as farmed salmon. Chicken is lowest, creating equivalent to about 7 kg CO2 per kg consumed.”
Marg comes into the room: “So, what are we going to have?” It’s too late, she’s overheard my conversation. “Chicken”, I answer back. She smiles, “Good choice. And you’ll be using charcoal instead of propane, I presume. Propane creates about 3 kg CO2 for every kg burned, you know.”
Now, which of my neighbours has a charcoal barbecue I can borrow?
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These are a collection of opinion articles principally written by CKM member Tom Powell for the Marlborough Express. Tom is a retired geologist who came to New Zealand in 2004 to work in the geothermal industry on the North Island, is a New Zealand citizen and now lives in Blenheim. Some articles have been written by other CKM members, and their names appear with those articles.