The aa genotype should
a*a = 0.4 * 0.4 = 0.16
Your answer should be lakes and forests. Acid precipitation will rot out forests because of the acid content and in lakes it raises the PH balance making it more acidic which in turn makes it harder for anything to live in these lakes or drink from them. (Hope this helps ^-^)
Unsaturated fats because of the sugars and fat that comes with it