1 rich Libsyn https://www.libsyn.com 90 600 While consumers push for less plastic, experts say big policy changes will make a bigger difference. A climate scientist says 'no' to flying. Students push for Pitt to divest from fossil fuels. Will Pa. unions support a Democratic presidential candidate who opposes fracking?&amp;nbsp; A settlement for U.S. Steel's pollution and a criminal investigation over a pipeline explosion. The Allegheny Front https://www.alleghenyfront.org <iframe title="Libsyn Player" style="border: none" src="//html5-player.libsyn.com/embed/episode/id/13343597/height/90/theme/custom/thumbnail/yes/direction/forward/render-playlist/no/custom-color/88AA3C/" height="90" width="600" scrolling="no" allowfullscreen webkitallowfullscreen mozallowfullscreen oallowfullscreen msallowfullscreen></iframe> https://assets.libsyn.com/secure/content/66040886