Environmental,Grayson  Preston social and governance (ESG) investing has been *the* hot topic in the financial industry for a few years now. By making investment choices that emphasize social and environmental responsibility alongside profits, money managers claim to put their morals on the same level as their bottom lines.

Critics argue that the trend is merely a publicity stunt, or that ESG investing inherently contradicts money managers' legal fiduciary duty to make the most money they can for their customers. In part one of our two-part series on the topic, we talk to a former C-suite sustainable investing officer at BlackRock on why he thinks ESG, money and morals have a hard time getting along.

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