As marijuana legalization swept the US in November, Arizona was alone in its rejection of legal weed.

The marijuana segment starts at 8:36 in the video above.

Lawmakers in about two dozen states have proposed bills this year to ease their marijuana laws despite Attorney General Jeff Sessions' warning that he could crack down on pot, a major change from the Obama administration, which essentially turned a blind eye to the state legislation.

Bills have been introduced in 17 states this year to make recreational pot legal for adults, while five others are considering voter referendums on the issue. Sixteen states have introduced medical marijuana legislation, 10 are considering decriminalizing the drug and three are considering easing their penalties. An effort in Wyoming to decriminalize the drug failed this session.

The business of legal cannabis is booming, and as interest in the cannabis industry continues to grow, it’s no wonder that a wide range of cannabis conferences are popping up like weeds. Whether you’re a small business looking to expand your reach to more customers, an entrepreneur seeking new opportunities, or a firmly established organization making your presence known, cannabis conferences are a great way to network among like-minded individuals and find new business opportunities.

The potential of marijuana and other cannabis products to help treat dementia and other disorders have appeared time and time again in various researches. However, further research to test marijuana's medicinal wonders have been continuously blocked by the law.

Experts, including David Schubert, told CNBC that legal issues are hindering his team from conducting more research in the medicinal properties of marijuana.

Cannabis prohibition at the federal level could soon come to an end thanks to congressional legislation introduced Thursday morning to remove cannabis from the federal Controlled Substances Act and instead regulate and tax it similarly to alcohol.

US Sen. Ron Wyden (D-OR) and House Rep. Jared Polis (D-CO) introduced the bills, which end federal prohibition, allow states to decide whether to legalize, and impose certain federal regulations on cannabis businesses in legal states.

The Senate bill would also put in place a federal excise tax on cannabis products. In the House, a cannabis tax is being floated as a separate measure, introduced by Rep. Earl Blumenauer (D-OR).

Walk into Brett Vapnik's medicinal marijuana dispensary in Los Angeles and the pungent aroma of pot is good and strong.

All day long, hundreds of people file in and out -- a sign of the strength of the pot industry, despite big question marks posed by the new administration of President Donald Trump.

For now Vapnik, who also has a small pot garden in his store, just sells marijuana for medicinal purposes: from the plant itself, with varying degrees of potency, to beauty products and even chocolate and cookies, all laced with herb.

But next year he expects sales to triple, as the most populous US state is slated to legalize sales and consumption of marijuana for recreational purposes.

The Georgia General Assembly is on the cusp of expanding access to medical cannabis.

The House voted 167-4 Tuesday to pass a bill that would add six new diagnoses to the list of qualifying conditions for medical cannabis oil, including autism, AIDS, Tourette's syndrome, and Alzheimer's disease. However, many of the diagnoses will be restricted to when the condition is severe or in the end-stage.

Additionally, anyone in a hospice program, regardless of diagnosis, will be allowed access to marijuana oil that's low on THC, the chemical responsible for the marijuana high.

Too many founders fail to pay attention to these crucial issues at the beginning, leading to huge costs later on.

A mistake at the startup stage can cost you a lot of money when it comes time to raise funds or sell your business. Take it from Jamie Firsten, a partner at the business law group at Toronto’s Cassels Brock, who works with early-stage companies and venture capital firms in the growing Canadian technology sector.