If Proposal 3 is approved, utilities will be mandated to have at least 25% of their annual sales of electricity come from renewable sources by 2025.
"We're looking at biomass, we're looking at wind power, solar power, so forth," said Craig Ruff, senior policy fellow at Public Sector Consultants.
Those supporting it say it'll help reduce pollution and create jobs.
"The supporters of Proposal 3 argue that by forcing utilities to go more toward renewable energy sources, it's going to create an entire new industry," Ruff said.
However, those against it say it'll be expensive and in the end, consumers may have to pick up the tab. The proposal does limit the utility rate increase to no more than 1% a year, but opponents insist it could end up costing consumers a lot more.
Michigan already has an energy mandate in place --- requiring utilities to get 10% of their electricity from renewable sources by 2015.
We want to note that Public Sector Consultants was hired by the group opposed to Proposal 3 to do independent research. Public Sector Consultants tells us they maintain their independence and have a history of doing this type of research. They say they are non-partisan.