This is going to be a thread about the annual #footbag Christmas Calendar, the Joulukalenteri. It is annual tradition going back more than a decade.

#footbag players from around the world submit their video to a main organiser. This year there was a lot of focus on different tutorials as it has been quite a different year for everyone. #hackysack
Day 1 we were in Colombia with "Don Gui", awesome countryside and drone shots. #footbag #hackysack https://t.co/VSvEXKDV0F
Day 2 we are learning about Barfly from Dante himself - https://t.co/gvnuESuQeO
Day 3 - The first of a series of doubles tutorials from @freestyle_smile and Sergio Garcia in Spain. #footbag #hackysack
Day 4 is some serious #footbag drilling with Derek Littlefield in Canada. https://t.co/XALiy8dXli
Day 5 is back to the Southern Hemisphere. Daniel Boyle @capitaleyes in Canberra, Australia. Thoughts on #footbag and #education https://t.co/UfwRgBHOxC
Day 6 Doubles up on #footbag Doubles - https://t.co/4Kkcrg5Bub
Day 7 - Marco Hartig showing some German action. #footbag #hackysack https://t.co/FNVM3LpGS9
Day 8 - More #footbag learning, this time the surging set - https://t.co/oc7IiLWE1w
Day 9 - Part 3 in the #footbag doubles tutorial series. https://t.co/tONoxmfAK2
Day 10 - It's Poland and Wiktor Debski - taking a break from the organising side, no rest for the shred. https://t.co/Zpt5L4Lz12
Day 11 - Matt Kemmer (USA) takes us through the difference between cross body rake and gyro toe. https://t.co/tnMAvljgdY #footbag #hackysack
Day 12 - Dominik Simku hitting a bunch of the Links of the Day. Making the almost impossible look very easy. https://t.co/JKG8ZJM6yv
Day 13 - An individual effort from Sergio Garcia, Merlin Madness. #footbag https://t.co/vkWjKdmWtw
Day 14 - A look into the #footbag life of @taishiishida https://t.co/mHy33t1RpM - always a great contributor the community.
Day 15 was intentionally left empty, marking the loss of Gary Lautt, Larry Workman and Rick Reese.
In the same theme, there are some great photos on the #footbag Hall of Fame Facebook page of some of those who have passed away - https://t.co/G1rnvGgjXD
Day 16 - #footbag doubles. Sergio and Paloma guide us through "announced" tricks - https://t.co/215Hgu0IYE
Day 17 - Zach Forth with something completely different. https://t.co/F3SnbSM1gz - a #footbag #hackysack animation panel. Zach has used his animation and video skills through the years with sometimes hilarious results.
Day 18 - Fifth and last in the #footbag doubles collection - https://t.co/kVD5L3Y78v
Day 19 - It's two familiar faces - Brian Sherril and Dustin Rhodes from California. These two each have great styles and always make a worthy contribution to the Joulukalenteri. https://t.co/MwuRQst2HR #footbag #hackysack #californiagames
Day 20 - We've had all the #footbag guide from Sergio and @freestyle_smile now it's time to see what they've got - https://t.co/6aRqxGYsSI
Day 21 - We're back in Colombia with Sebastian Ceballos - and he's showing us how to combine #skipping and #footbag - https://t.co/Cwe58y7MeD - what an entertainer.
There are a few more days left of the #footbag Joulukalenteri. What more will we see? Make sure to try the Links of the Day and the Scavenger Hunt. https://t.co/HBglZ9j5Qs

More from Society

@danielashby @AdamWJT @Greens4HS2 @TheGreenParty @GarethDennis @XRebellionUK @Hs2RebelRebel @HS2ltd I'll bite. Let's try to keep it factual. There's a reasonable basis to some aspects of this question, that it might be possible to agree on. Then there are other, more variable, elements which depend on external factors such as transport and energy policy. /1

@AdamWJT @Greens4HS2 @TheGreenParty @GarethDennis @XRebellionUK @Hs2RebelRebel @HS2ltd First up, we know reasonably well how much energy it takes to propel a high-speed train along the HS2 route. We can translate that into effective CO2 generated by making some assumptions about how green the electricity grid is. /2

@AdamWJT @Greens4HS2 @TheGreenParty @GarethDennis @XRebellionUK @Hs2RebelRebel @HS2ltd Secondly, we have a reasonable grasp of how much CO2 is going to be generated by building HS2 - there are standard methods of working this out, based on the amount of steel, concrete, earthmoving, machine-fuelling etc required. /3

@AdamWJT @Greens4HS2 @TheGreenParty @GarethDennis @XRebellionUK @Hs2RebelRebel @HS2ltd Thirdly, we can estimate how much CO2 is generated by cutting down trees, and how much is captured by planting new trees. We can also estimate how much CO2 is needed to keep the railway running and generated by maintaining the track /4

@AdamWJT @Greens4HS2 @TheGreenParty @GarethDennis @XRebellionUK @Hs2RebelRebel @HS2ltd We know how much CO2 is saved by moving goods by freight train on the lines freed up by moving the express trains on to HS2, rather than by truck. /5

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