Corporate boards of directors must tackle questions about sustainability in a new and urgent...: Corporate boards of directors must ask questions about sustainability in a new and urgent manner. If they don’t, they will hear from investors about their lack of action. In just the latest indication of the investor community’s increasing scrutiny on sustainability, Yahoo announced in 2018 that it would start publishing sustainability ratings for publicly traded companies. In order to fulfill their obligations, every listed company board must now become “sustainability/ESG fluent.