This year was a pivotal one for marijuana.
It began with then-U.S. Attorney General Jeff Sessions sending waves of uncertainty and fear over the cannabis industry and legalization supporters on January 4, when he formally rescinded Obama-era guidelines protecting state marijuana laws.
But as 2018 went on, even more states ended up changing their laws to allow for legal recreational or medical cannabis use despite the conflict with federal law. Efforts to end national prohibition in Congress picked up steam as well. And several nations moved to significantly overhaul their marijuana laws.