[8] Initiative 1631 differed in that it proposed to use revenue from carbon fees to invest in projects to reduce pollution.

The initiative also proposed to invest over $250 million in climate adaptation in the areas of forestry and water conservation.

[10] The particular projects funded would be determined by a board appointed by the Governor of Washington that would be directed to invest 70% of the revenue in clean energy.

Elected officials who supported this initiative included United States Representative Pramila Jayapal and Washington Governor Jay Inslee.

[13] Companies that funded the campaign against the initiative included Cascade Natural Gas,[3] BP, Royal Dutch Shell, Chevron, and Phillips 66.

[15] Others opposed the measure because section 9(c) specifically exempted "Fossil fuels directly or eventually supplied to a light and power business for purposes of generating electricity" from the carbon tax.

[3] This meant that coal, gas, and diesel power plants would not directly be responsible for paying the carbon tax.