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.
What are the symptoms of exposure to blue-green algae? Symptoms from drinking water that contain blue-green algae can include: headaches, nausea, fever, sore throat, dizziness, stomach cramps, diarrhea, abdominal pain, vomiting, muscle aches, mouth ulcers, and blistering of the lips.
Causes of green algae. Unlike the other algae, green algae isnât necessarily a sign of poor tank conditions. It can be unsightly, however. The cause of huge blooms is phosphate and nitrate in excess of what can be taken up by the tank plants, perhaps because of excess feeding, fertilisation or crowding of the aquarium.