What is "greenwashing"?

"Greenwashing" is:

...defined by the Oxford English Dictionary as “disinformation disseminated by an organization so as to present an environmentally responsible public image.”

Other than being deceptive and dishonest, why is "greenwashing" bad?

Endowed with bigger marketing and public relations budgets, greenwashers shut the door on genuinely green business struggling to get a foothold in the marketplace.

Watch out for "greenwashing" in the Quarry.