A paper from Science of the Total Environment shows that the largest freshwater fish in China might have gone extinct between 2005 and 2010. Wei Qiwei, author of the paper, said in September, 2019, some experts supposed that the first-class protected fish had been extinct already.

Third, the music becomes a multi-media experience; a part of a total environment.

The article discussed how to provide a living environment for the old people from seven aspects, involving total environment design and adaptable design of houses etc.