Read here.
"In 1954, the US detonated the world’s largest nuclear weapon at Bikini Island in the South Pacific. The bomb was equivalent to 30 billion pounds of TNT, vapourised three islands, and raised water temperatures to 55,000 degrees. Yet half a century of rising CO2 later, the corals at Bikini are thriving. Another drop in pH of 0.075 will likely have less impact on the corals than a thermonuclear blast. The corals might even survive a rise in ocean temperatures of half a degree, since they flourished at times when the earth’s temperature was 10C higher than the present....There seems to be no shortage of theories about how rising CO2 levels will destroy the planet, yet the geological record shows that life flourished for hundreds of millions of years with much higher CO2 levels and temperatures. This is a primary reason why there are so many skeptics in the geological community. At some point the theorists will have to start paying attention to empirical data."