Oregon Second District Congressman Greg Walden says the House Energy and Commerce Committee he chairs will hold a hearing next week on the impact wildfires have on air quality.   The panel’s subcommittee on the Environment will hold the hearing Wednesday.  At a committee meeting earlier this month, the Hood River Republican said there is a need for urgent action to prevent catastrophic wildfires and protect air quality in Oregon.  The Wednesday hearing will be streamed live on the Energy and Commerce Committee’s website at 7 a.m. Pacific time.