The police is constantly shooting tear gas, but they've found quick ways of extinguishing it with traffic cones and water. I've now seen videos of them using leafblowers to blow the gas away before extinguishing it.
To prevent police vehicle movement, they've come up with a system of digging up brings and putting them in a three-brick formation onto the roads in such a way to prevent cards from moving through (bricks would get into the wheels assembly).
They have networks of people with supply station throughout the protests, distributing water, first aid, umbrellas, masks, etc.
I've seen them build entire roadblocks with actual brick and mortar during the week of the university siege.
It's truly incredibly what a motivated and organized group of people even when lacking formal leadership. In fact, it makes them far more resilient. Without leadership. you can't "cut off the head" of the movement, so to speak.
Where There Is No Doctor: A Village Health Care Handbook
It was discussed a little here over year ago at:
https://news.ycombinator.com/item?id=19431005
It can be purchased in book form, or the individual chapters can be downloaded as PDFs at:
It's a simple mathematical model, existing capital has full access to co-opt any crypto software relying on capital based supply generation of the cryptocoins. Bitcoin and other Proof-of-Work systems which run warehouses full of hardware generating random numbers is no different than the existing system, unless you're trying to extract wealth from uninformed targets who are unaware of how the algorithm was designed.