What growing problem for marine life in discussed in the video? What is the cause of this problem?

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves