Boulder CO’s Carbon Tax. The passage of a city-wide referendum in November 2006 established a charge on electricity users based on how much energy they use. The money raised by the tax supports Boulder’s Climate Action Plan. “Climate Action Plan Tax – Boulder CO” www.ilsr.org “How Boulder Taxed its Way to a Climate-Friendlier Future” 11/2/15. www.insideclimatenews.org In 2012 voters again approved the carbon tax, by an 82% – 18% vote. In November 2022 Boulder voters approved 2 measures (2A and 2B) that will support climate action in the city. The Climate Tax goes into effect on 1/1/23 and will replace the original Climate Action Plan and Utility Occupation Taxes. Details at www.bouldercolorado.gov/news/preliminary-november-2022-election-result-roundup