WASHINGTON ?EUR??,,????'??? Air pollution, abusive use of motorized vehicles and other deficiencies have prompted the National Parks Conservation Association to list five new parks and five former listees on their Ten Most Endangered National Parks list. ?EUR??,,????'??Designation as a national park alone doesn?EUR??,,????'???t protect our parks,?EUR??,,????'?? said NPCA senior vice president Ronald J. Tipton. ?EUR??,,????'??Parks also need strong support from the president and Congress.?EUR??,,????'?? Parks on this year?EUR??,,????'???s list include: Big Thicket national Preserve in Texas; Denali national Park and Preserve in Alaska; Florida?EUR??,,????'???s Everglades National Park; Glacier national Park in Montana; Great Smoky Mountains National Park in North Carolina/Tennessee; Joshua Tree National Park in California; Ocmulgee National Monument in Georgia; Shenandoah National Park in Virginia; Virgin Islands National Park; and Yellowstone National Park in Idaho, Montana and Wyoming. Parks delisted this year include: Big Bend National Park in Texas; Big Cypress National Preserve in Florida; New York?EUR??,,????'???s Federal Hall National Memorial; Glacier bay National Park and Preserve in Alaska; Mojave National Preserve in California; and Pennsylvania?EUR??,,????'???s Valley Forge national Historical Park. ?EUR??,,????'??The only way to preserve national parks is to address park threats,?EUR??,,????'?? said NPCA president Thomas C. Kiernan.