Greta: You failed, but you could learn from Hong Kong.

After a year spent mobilising the middle-class masses, calling out UN bureaucrats and trolling Trump, Greta’s battlecry marching into 2020 is: “We have achieved nothing.”

It only took Hong Kongers four months to force the Chinese government to scrap the extradition bill. Photo: Wikimedia Commons.

Greta Thunberg and her pigtails took the world by storm last year, bringing entire…