Axios Denver reports:

The latest: Washington on Wednesday announced a plan to study the feasibility of building small modular nuclear reactors (SMRs) to help make DIA the greenest airport in the world.

• Denver's airport has put out a request for proposals to conduct the study, which Washington said will cost about $1 million and take six to 12 months.

How it works: SMRs are advanced nuclear power plants with a smaller footprint, faster build time and lower safety risks than traditional reactors.