Final answer:
Ballot Initiative 502 was proposed to address issues related to marijuana prohibition, including its regulation and taxation.
Step-by-step explanation:
The ballot initiative 502, namely the legalization of recreational Marijuana in 2012, was proposed to address issues related to marijuana prohibition. The initiative aimed to regulate marijuana in a manner similar to alcohol, emphasizing public health and safety while also providing a source of additional tax revenue through the regulated sales of marijuana.
Colorado voters approved the initiative, marking a significant shift in the government's stance on marijuana and leading to a series of similar actions by other states.