Sentences with phrase «annual number of wildfires»
In the western US overall, the average annual number of wildfires that are bigger than 1,000 acres has more than doubled since 1970, according to Climate Central.
http://www.businessinsider.com/ Not exact matches
Since 1970, the annual average number of wildfires larger than 1,000 acres has more than doubled in the western U.S..
Annual data on the number of wildfires and burned area also show an increase from 1968 to 1994, and are significantly correlated with both fire hazard indices.»