Problems from weeds, weed control, cost Montana nearly 200 million dollars a year. Montana has lost agricultural areas from salinization, problems of forest management, problems of forest fires. Second item on my checklist: climate change. Yes -- the climate in Montana is getting warmer and drier, but Montana agriculture depends especially on irrigation from the snow pack, and as the snow is melting -- for example, as the glaciers in Glacier National Park are disappearing --
而为了除去杂草，以及控制其扩散，蒙大纳州每年几乎都要花费 2亿美元。此外，蒙大纳州的可耕土壤面积还不断在减少， 原因包括：土壤盐碱化、森林管理失调 以及森林大火问题等。接着考虑我的清单上的第二点： 气候变化：是的，蒙大纳州的气候逐渐变得更加干热， 蒙大纳州的农业主要是依靠雪水灌溉， 因为气候变暖，雪水渐渐消融，我们可以看到， 国家冰河公园的冰川正在逐渐消失，