Project 46 is an innovative regional climate alliance that unites the cities of Bloomington, Nashville, and Columbus in Indiana. This collaborative is distinguished by its bipartisan, cross-sector approach and spans multiple counties, aiming to pool resources and efforts to achieve better climate outcomes in the region.

The rationale behind a regional climate collaborative, as opposed to individual city efforts, is the enhanced capacity to tackle climate challenges more effectively and efficiently. A key advantage of such collaboration is the ability to apply for grants together, significantly increasing the likelihood of securing funding. By presenting a united front, these cities can demonstrate a larger impact potential to funding bodies, including state and federal programs, making their applications more competitive.