Question: Alkalinity is the name given to the quantitative capacity of an aqueous solution to neutralize an acid, measuring alkalinity is important in determining a stream's ability to neutralize acidic pollution from acid rain, or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions, and which ph?
{'answer': 'low pH', 'supporting_facts': [['Alkalinity', 1], ['Acid rain', 0]]}