Saving the Great Salt Lake isn’t something that can be done overnight, and definitely not without some tough choices.

Three years ago, when the Great Salt Lake was at its lowest levels, Utah lawmakers were alarmed enough to try what may be impossible: save the lake from drying up.

Dear EarthTalk: Why is the Great Salt Lake shrinking so much and can it be saved? – E.T., via email Answer: Utah’s Great Salt Lake is the largest saltwater lake in the Western Hemisphere.