The carbon fee initiative I-1631, would impose a starting fee of 15 dollars per ton on carbon emissions, starting in 2020. The fee would increase $2 each year until greenhouse gas reduction goals are met, according to the proposal.

The measure is expected to raise more than $2 billion in its first five fiscal years. Authors of the initiatives say 70 percent of the revenue would be invested in building up a clean energy infrastructure.

The following debate features Becky Kelley of the Washington Environmental Council, in favor, and Dana Bieber, opposed, spokeswoman of the No on 1631 campaign.

Read text of Initiative 1631

Fact check: Ad takes aim at carbon fee Initiative 1631