The boom in so-called ESG investing has been accompanied by a sharp rise in complaints about greenwashing — exaggerations or misleading statements about environmental claims. It’s a rise driven by the so-called “greenium” — the money companies can save by convincing lenders to offer better terms when borrowing is tied to an ESG (environmental, social or governance) goal. Figuring out what’s real and what isn’t has grown even more complicated in debt markets, where a host of new lending formats