TED-ED: What's so great about the Great Lakes? - Cheri Dobbs and Jennifer Gabrys

The North American Great Lakes, known as America's inland seas, are a massive freshwater system formed over 10,000 years ago during the last ice age. They contain 20% of the world's fresh surface water and support diverse ecosystems. Water flows from Lake Superior to Lake Ontario, providing resources and benefits but also facing challenges like pollution and invasive species. Conservation efforts by the US and Canada aim to protect this vital natural resource.

What new insight or understanding did you gain from this video?