In this week’s episode, AIN London-based editor Charles Alcock and FBO editor Curt Epstein talk about business aviation’s sustainability efforts in light the 50th Earth Day that was celebrated on Wednesday. Meanwhile, as the Covid-19 crisis drags on, editor in chief Matt Thurber discusses remote audits for flight departments during the pandemic, air transport Gregory Polek highlights more airline bankruptcies, Wichita-based editor Jerry Siebenmark explains how preowned business aircraft sales are currently fairing, and Washington, D.C. editor Kerry Lynch gives an overview of AIN’s webinar this week on supply chain during the Covid crisis .