By Ross Kerber

(Reuters) – Tesla Inc (NASDAQ:) Elon Musk, CEO of Inc. may have declared business use ESG (eco-social and governance) as a fraud last week. However, one pioneer in sustainable investing believes the electric carmaker remains committed to this cause.

John Streur of Calvert Research and Management praised Tesla for disclosing workforce diversity data in May. He also said Tesla is still included in his ESG Indexes despite it being dropped from the index last week. This prompted Musk to fury.

Streur, a Tesla employee said that Tesla had fully accepted operational excellence. This is what ESG stands for.

When asked whether Musk believes in ESG Streur, Streur responded “I cannot speak on his behalf but I do believe that his company does”.

Streur’s comments come at a moment when ESG investment is being criticized by conservatives, who believe questions such as how to reduce carbon emissions should not be left up to investors but the government.

Calvert. Morgan Stanley Streur described the unit as having a “full-weight” Tesla product, such as its Calvert US Large Cap Core Responsible Index Fund.

One twist to Musk’s tweets: Several Tesla insiders, including Hiro Mizuno, support ESG improvements. Mizuno, May 7, said that Tesla is not decrying ESG investments. Martin Viecha, Tesla’s investor relations chief ESG ratings, should instead be focused on the real-world impacts.

Tesla, Viecha, and Mizuno didn’t immediately respond to our request for comment.

Streur acknowledged that ESG data could be messy. After Calvert’s October resolution was supported by a majority, Streur praised Tesla for publishing new details about diversity.

Streur stated that Tesla will be facing more ESG risk as it grows. These include issues such as mining and location.