The calls to Clear Lake State Park come in steadily now from people saying they’ve heard the lake may no longer be safe for swimming…. It’s pretty clear why. A composite satellite image produced by the National Aeronautics and Space Administration’s Earth Observatory depicting a nasty-looking, solid green lake has been circulated widely over the past two weeks, republished by news agencies around the nation and posted all over social media, to the chagrin of Lake County tourism interests.