P2 stands for "Pollution Prevention," also known as "source reduction". It refers to any practice that reduces, eliminates, or prevents pollution at its source before it is created. P2 can be practiced by modifying equipment and production processes, promoting the use of non-toxic or less toxic substances, and implementing water and energy conservation practices. P2 is considered the most desirable approach for addressing pollution whenever feasible. The U.S. Congress has declared P2 as the most desirable approach for addressing pollution. P2 grants for state and tribal programs help businesses obtain information about and adopt source reduction practices to protect the environment and save money.