That's the first paragraph in Ethical Corporation's blog post titled
"Big brands may be tarnished by past environmental legacies"
The post continues
"The downside to going green is reputational vulnerability for the companies concerned. This publication recently had a series of exchanges with a member of GE's press office concerning our July cover story.
The officer in question felt it was unfair, yet could not dispute a single fact in the article. While some of the US press have reported well on the environmental legacies of brands now seeking environmental credentials (often, it must be said after considerable investments, such as in GE's case), many have not written much about the impact of decades old pollution.
From Ethical Corporation (that link above is worth a read)