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.

[12] Other organizations that supported the initiative included Stand.earth, The Nature Conservancy, and local chapters of 350.org and the Sierra Club.

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.