David Elfstrom
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Is it time to replace that expensive HEPA filter, or is it almost as good as new? How much clean air does it provide? Does it match manufacturer's claims? Made your own? Here's how to test the CADR (Clean Air Delivery Rate)
08:54 PM - Sep 14, 2023
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David Elfstrom
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Manufacturing one bag of cement adds over 700 bags volume of infrared heat absorbing CO2 gas to the atmosphere. Picture that.
11:19 PM - Aug 04, 2023
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David Elfstrom
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Most of the gasoline you buy ends up as waste heat, not useful motion. Not so for electric vehicles.
07:41 PM - Jul 28, 2023
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Joe Vipond
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"A promise of net zero cannot be used as a sort of get-out-of-jail-free card, with a feigned fealty to climate action but, in reality, a plan to put off the work. There’s a danger the seemingly distant 2050 becomes yet another delay tactic"
10:26 PM - Jul 04, 2023
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Joe Vipond
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07:34 PM - Jul 01, 2023
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Christopher Bouzy
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Twitter is the largest far-right platform on the planet.
04:09 AM - Jun 21, 2023
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Robson Fletcher
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For a city of 1.3 million, Calgary has some amazing natural spaces well within city limits.

Met this moose out riding in Bowmont Park last night.

#yyc #calgary #Alberta #Canada #cycling #MTB
04:49 PM - May 10, 2023
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Robson Fletcher
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A vote of no-confidence ... in the future? How Albertans' pessimism may shape the provincial election:

• Only 16% of Vote Compass respondents say province is headed in the right direction

• 76% believe young Albertans will be worse off than their parents

#ableg #Alberta #cdnpoli
11:02 AM - May 04, 2023
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