washington u.s. lawmakers house representatives arm service committee ask pentagon wednesday produce report climate change effect military report would list service 10 vulnerable military installations risk flood sea level rise wildfires threats associate climate change amendment language quote secretary defense jam mattis say agree effect change climate increase maritime access arctic rise sea level desertification among others impact security situation recent years president donald trump express skepticism whether climate change real sometimes call hoax since become president offer opinion house arm service committee adopt measure bring representative jim langevin democrat defense policy bill yet consider full house house panel want know climate change impact military