James F. Black (1919-1988) was the Scientific Advisor in the Products Research Division of Exxon Research & Engineering, and one of the top technical people at Exxon Research & Engineering until his retirement in 1983. In 1977, Black told Exxon's management committee of top executives that emerging science showed how carbon dioxide levels were rising, were likely driven by fossil fuel use, and increases would boost global temperatures leading to widespread damage.
Later in 1978,
"He warned Exxon scientists and managers that independent researchers estimated a doubling of the carbon dioxide (CO2) concentration in the atmosphere would increase average global temperatures by 2 to 3 degrees Celsius (4 to 5 degrees Fahrenheit), and as much as 10 degrees Celsius (18 degrees Fahrenheit) at the poles. Rainfall might get heavier in some regions, and other places might turn to desert."
Banerjee, Neela. Exxon: The Road Not Taken (Kindle Single) (Kindle Locations 53-57). InsideClimate News. Kindle Edition.
Oceans cover at least 71% of the Earth's surface. Most of the life on earth resides in the oceans. They help to regulate Earth's climate by absorbing carbon dioxide; at the moment we are uncertain how much more carbon dioxide oceans will absorb. Oceans provide jobs for many thousands of people in the fishing industry. Seafood serves the needs of billions of people. At the moment fishing stocks are on the decline, a new warning sign.