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1.
How can we make air conditioners more efficient? [video] (youtube.com)
371 points by zeristor on Aug 22, 2021 | 216 comments
2.
Procrastination is driven by our desire to avoid difficult emotions, says expert (cbc.ca)
613 points by pseudolus on June 16, 2020 | 312 comments
3.
Ask HN: How Can I Learn Music Theory?
673 points by deanstag on Dec 18, 2019 | 239 comments

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