The Conservation Law Foundation is drawing flak for setting up a business arm that is pushing an additive to clean up gasoline in countries that haven’t yet banned lead, and is planning to share in the profits from the additive’s sale. Critics say that by promoting private, profit-seeking ventures, CLF will ruin its reputation as an environmental watchdog in New England. Several staffers have left CLF in part over concerns about the business ventures, but CLF Pres. Douglas Foy says that partnering with businesses can help achieve important environmental goals.