Andrew Revkin, a former science and environment reporter for The New York Times who now blogs on nytimes.com, this week lauded the handful of downtown East Hampton Village businesses that had their doors closed on a recent hot summer day, but he called out with displeasure the many other shops whose air-conditioning was pouring out onto the street. A letter-writer in these pages this week also decried the bad habit of some retailers, calling the waste of the electricity needed to power all the cooling “shameful.”