great lakes maps

What lies beneath the Great Lakes' waves is unknown, but there's a push to learn more about thousands of shipwrecks, underwater infrastructure and the impacts of climate change on the bottom.

House Representatives Debbie Dingell, a Democrat, and Lisa McClain, a Republican, have introduced a bill to commit to exploring below the surface of the Great Lakes.

President Donald Trump has signed legislation to update maps of environmentally sensitive areas of the Great Lakes.The legislation prioritizes and updates…