In a local park, several environmental changes are noted; crayfish eggs in the lake are fewer than normal. When tested, the water from the lake has an elevated level of aluminum. What addition to the lake is the most likely cause of these conditions? A)
acid rain
B)
lead from batteries
C)
sulfur dioxide particulates from a near-by factory
D)
carbon monoxide from cars near-by
E)
increased ozone from sun exposure