The U.S. EPA will announce this week it wants to relax Obama-era targets on vehicle pollution, setting in motion a potential war with California. Meanwhile, greenhouse gas emissions from transportation keep rising, overtaking all other sectors in the country. Climatewire reporter Camille von Kaenel explains what to expect. Margo Oge, the former EPA official who negotiated the Obama targets, and Robbie Diamond, the CEO of Securing America's Future Energy, also chime in. "Trump to allow more car pollution. But by how much?" (Climatewire, 03/26/2018), by Camille von Kaenel: www.eenews.net/stories/1060077379