This story is part of the KXAN Data Hub, where numbers help tell the whole story. We’ve created several data-driven stories and databases on topics including weather and climate, politics, education, ...

EPA estimates nationwide emissions of ambient air pollutants and the pollutants they are formed from (their precursors). These estimates are based on actual monitored readings or engineering ...

All proposals must be submitted in accordance with the requirements specified in the funding opportunity and in the Proposal & Award Policies & Procedures Guide (PAPPG) and its supplements. All NSF ...