AAP: NATIONAL parks could be contributing to Australia’s bushfire problems, according to a federal MP. “We can’t go on like this,” Nationals senator Ron Boswell told reporters in Canberra. “I’m not blaming anyone for this, but we’ve got to look at some areas that we turn into parks and then can’t defend.” Locking up areas up as national parks resulted in a build-up of fuel. “And then bang, one day a fire goes through it,” Senator Boswell said. Politicians have …