Man made carbon dioxide comes from the burning of fossil fuels. an example of a fossil fuel is question 1 options: a) wood b) shale c) oil question 2: ocean acidification begins with question 2 options: a) pollution from ships b) dumping of waste from cities into the ocean c) carbon dioxide released from combustion question 3 very slight increases in the acidity of seawater marine organisms that make shells. question 3 options: a) doesn't bother b) is unhealthy and stresses c) has no effect on