21 U.S. states pass renewable portfolio standards, 12 more consider legislation

There are a growing number of U.S. states who have passed Renewable Portfolio Standards, mandating that a portion of their future electricity supply come from renewable sources. Twenty one states have already passed RPS initiatives, with twelve more currently considering legislation.

The Union of Concerned Scientists has published an online tool to assist in tracking the RPS initiatives in each state called the Renewable Electricity Standards Toolkit.

"In a growing number of states, renewable electricity standards have emerged as an effective and popular tool for developing a cleaner, more sustainable power supply. UCS created this toolkit to provide renewable energy advocates, policy makers, researchers, and concerned citizens with both summary-level and in-depth information on the design and implementation of each existing state standard."