How is lake Erie getting dirty?

What happens to a river a time passes? What percentage of the worlds fresh water is stored as glacial ice? Does a tsunami effect ocean currents? How could tree roots in forest soils grow into subsoil and help a tree survive? What is Lao Xus job in the forbidden city? What is a main road built to avoid a city? Do forest cover less than one fourth more than one half or allof Washington? What are the ratings on the Slender Tone? Where to get to blue lake pokewalker? How does Alton towers distribute its profits? What forests do Wild Boars live in? What are the typical reasons one might consider bridge financing? What movies were filmed at niagara falls? What is a waterfall braid? Why do wetlands have such high nutrients? What types of crops did they grow at mission san Rafael? The deep sea divers kept warm by wearing suits that water could not penetrate.? What is the Max depth of yellow river? What is the only sea that is completely surrounded by water? What are one advantage and one disadvantage to the construction of a dam on a river?