Explain how extremes of pH limit growth. Majority of organisms live or grow in habitats between pH 6 and 8 obligate acidophiles: Euglena mutabilis-alga that grows between 0 and 1.0 pH Thermoplasma-archae that lives in hot coal piles at a pH of 1 to 2, and would lyse if exposed to pH 7.
Most of the current California wildfires are in the north, including a large one in Mendocino County and several others in the Sierra Nevada, the north coast and the San Joaquin Valley.
The average 10-year total of U.S. wildfire acres burned and caused by humans is 1.9 million acres where 2.1 million acres burned are lightning-caused. Still, human fire activity is the primary cause of wildfires - having nearly ten times the start rate of natural starts. The average 10-year percent U.S. wildfire starts are 88% human caused and 12% lightning caused. Most of these human fires result from accidental causes.