They legalized it. Now they want to tax it.

Lawmakers in Colorado and Washington state are looking to bolster their budgets by taxing recreational marijuana, which voters approved in November. Not everyone, however, views such proposals as the best option for cash-strapped states looking for a revenue fix. Why are people harshing on your buzz? A look at the pros and cons of taxing weed:

The upside

Money. Lots of it. According to Politico, lawmakers are getting excited "with talk that a tax on marijuana could pump hundreds of millions or even billions into budgets still reeling from the recession."

In Washington state, legislators are looking at a tax on "all trademarks, trade names, brand names, patents and copyrights related to marijuana" that would help fund agricultural research, according to the Seattle Times. The state also wants to impose a 25 percent tax on marijuana growers, processors, and retail stores.

The total haul? Washington's Office of Financial Management says it could bring in more than $565 million in 2017.

Colorado is considering a 15 percent tax on wholesale marijuana purchases for businesses and a sales tax for consumers that could be set as high as 25 percent, according to the Denver Post. Last year, a study by the Colorado Center on Law and Policy estimated that regulating marijuana like alcohol could raise about $47 million.

In these scenarios, state budgets would get an infusion of cash, while smokers light up without fear of arrest. So why isn't everyone feeling irie?

The downside

Raise taxes too high and you'll drive pot-smokers back to their dealers, says Rep. Jared Polis (D-Colo.):

You want to make sure the black market doesn't have an advantage over the regulated market because if it does, then the whole concept fails and people will continue to buy marijuana illegally — so there has to be a price advance for the legal market. [Politico]

Sky-high tax revenue projections might also be too optimistic because nobody really knows how big the marijuana market is. And lawmakers shouldn't forget to account for the cost of actually regulating legalized weed. Rep. Dave Reichert (R-Wash.), a former police officer, tells Politico, "I don't think the revenue they raise will be near enough to cover the cost of regulating pot stores."

The biggest fear of all, though, is that the federal government will eventually reap all the rewards. As The Washington Post reports, "business owners say they're anxious about the intentions of the federal government, which could seize millions of dollars they have invested or even send them to prison." Planning state budgets can be tricky if you're scared that hundreds of millions in tax revenue might go up in smoke. The federal government has yet to officially respond to the legalization of marijuana in the two states, though Attorney General Eric Holder says the Obama administration will have its say soon. If that makes state lawmakers and pot aficionados nervous, they'll at least have something to treat their anxiety.