According to a recent study in a scientific journal, ExxonMobil (NYSE:XOM) and ConocoPhillips (NYSE:COP) are responsible for over 4% of global CO2 emissions since 1750.

For followers of Warren Buffet and investors in Berkshire Hathaway (NYSE:BRK-B) (NYSE:BRK-A), this information may be a bit unsettling. The politics of global warming are certainly still up for debate, but the science, overwhelmingly, is not. 

For value investors, does the prospect of a rock-solid dividend in a stable value company outweigh both the social impact of profiting from these levels of carbon emissions, and the future risk to the bottom line as governments eventually up regulation to try and stem climate change?

In the video below, Motley Fool contributor Jay Jenkins explores the issue -- it's his view that the answer, while maybe difficult to swallow, is obvious.

Fool contributor Jay Jenkins has no position in any stocks mentioned. The Motley Fool recommends Berkshire Hathaway. The Motley Fool owns shares of Berkshire Hathaway. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.