Why are lakes that have been affected by acid rain often clear of blue?

Lakes affected by acid rain often appear clear and blue due to reduced levels of nutrients, particularly phosphorus, which can limit the growth of algae and phytoplankton. The decrease in these organisms allows for greater light penetration, giving the water a clearer appearance. Additionally, the acidity can harm or reduce the populations of species that contribute to turbidity, further enhancing the lake's clarity. However, this clarity often comes at the cost of biodiversity and ecosystem health.