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.
Blue-green algae, also known as cyanobacteria, is capable of causing sudden death when high concentrations are ingested. This toxicity is known to occur worldwide and affects not only livestock, but wildlife, marine life, and humans as well. Blue-green algae tends to grow on the surfaces of farm ponds during the summer season.