Burning trash has been linked to health problems in the U.S., which could be largely due to the old incinerator models in use. But in Europe, cleaner incinerators are coming online. We learn about one in Copenhagen. Also, we review the week in politics news, including Attorney General William Barr's defense of his handling of the Mueller report and Democrats' calls for Barr to be impeached. That and more, in hour one of Here & Now's May 3, 2019 full broadcast.