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2016-12-24 17:20:51来源:网络

  But climate, however critical, is only part of the problem, scientists say. A growing body of evidence suggests that other human activity and policy have at least as much impact on wildfires as climate change. To effectively address a longer and more intense wildfire season – and ensure the safety of residents in fire-prone areas – both environmental and human factors have to be taken into account in more holistic ways, they say.

  That means more than just sweeping dry brush off the front porch. Though such steps are an important part of the process, officials and researchers alike are calling for a comprehensive approach to wildfires: one that incorporates fire safety and behavior in key policy decisions and legislation. Such an effort would also recognize that fire can be helpful as well as harmful and embrace fire’s place in human society.

  “We need not just a policy shift but also a cultural shift in the dialogue around fires in our landscape and how to manage them,” says Jennifer Balch, director of Earth Lab and a professor of geography at the University of Colorado in Boulder. “Fire is not something we can remove. A large majority of the country is living in fire-prone areas. How do we live with wildfire? How do we manage?”

  “More and more researchers are arguing that anthropogenic influences are really important [to understanding wildfires],” adds Max Moritz, a specialist in fire ecology and management and a professor at the College of Natural Resources at the University of California, Berkeley. “By leaving them out we’re missing a critical piece of the solution.”

  Changing attitudes on fire

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  Though often viewed as a problem for western states, the growing frequency of wildfires is a national concern because of its impact on federal tax dollars, Professor Moritz and others say.

  In 2015, the US Forest Service for the first time spent more than half of its $5.5 billion annual budget fighting fires – nearly double the percentage it spent on such efforts 20 years ago. In effect, fewer federal funds today are going towards the agency’s other work – such as forest conservation, watershed and cultural resources management, and infrastructure upkeep – that affect the lives of all Americans.

  Another nationwide concern is whether public funds from other agencies, such as the Department of Housing and Urban Development, are going into construction in fire-prone districts. As Moritz puts it, how often are federal dollars building homes that are likely to be lost to a wildfire?

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