What, message does the news item mainly try to convey?

The World Health Organization warns that 25 percent of the world’s population, or 2. 5 billion people, will have hearing problems by 2050. The report found that many of the causes of hearing loss are preventable. They include infections, disease, birth defects, too much noise and lifestyle choices. To fight hearing loss, the report suggests measures which could cost what is equal to $ 1. 33 for every person each year. And 700 million would require some kind of treatment for hearing loss by 2050.