If the Copyright Office has no confirmation that a composer or song-writer is still living and it has been 75 years since the first copyright protection order was granted, or 100 years since the recognized creation date of the piece, it becomes public domain.
Exposure to blue-green algae can cause rashes, skin and eye irritation, allergic reactions, gastrointestinal upset, and other effects. At high levels, exposure can result in serious illness or death.
Some of the blue-green algae produce odor-generating by-products that are not toxic but have a very unpleasant smell which can cause sensitive individuals to become nauseated (upset stomach, vomiting) and develop headaches. Health Problems Exposure to HABs Can Cause in People & Pets. Drinking/Swallowing HABs-Contaminated Water