NEW YORK – Procter & Gamble has promised a group of shareholders it will disclose more details about how it audits wood-pulp suppliers after shareholders pushed the maker of Charmin toilet paper for years to source forest products more sustainably. P&G has previously said it performs audits but provided little information about them. Logging’s impact on the environment has raised scrutiny of P&G and other major pulp users. The next step is for P&G and the investors to discuss specifics of what the company will now disclose, said Andrew Shalit at Green Century. …The company said it guards details of its global supply chain for competitive reasons. Green Century wants clarity on P&G’s supply chain to set an example for other companies that rely on Canadian pulp, such as Home Depot. …The company relies on third-party certifiers, such as the nonprofit Forest Stewardship Council, to ensure its wood pulp is sourced sustainably.