The tobacco industry knew that cigarettes were both addictive and carcinogenic. They sold them anyway, and hired professional obfuscators and lobbyists to bury the truth.
Now we know that the oil industry is the same way. Exxon knew how much carbon was buried in oil reserves. They knew how much carbon dioxide was in the atmosphere. They were able to calculate in 1979 what burning all that oil would do to the carbon dioxide concentration.
They knew. They didn’t care what its effects were. They only cared about their bottom line.
You know, the future is going to look back on rabid capitalism as one of the damning pathologies of our history.