Developers and landlords have for decades sought green certification to help them attain a level of sustainability. …But as the industry for independent review grows, some organizations have started to offer verification in other areas. …The crowded field has left some wondering which ones are necessary and which ones are just marketing gimmicks. One of the best-known certification programs is run by the US Green Building Council… or LEED. …Top sustainability programs include Energy Star from the EPA and the Green Globes from the Green Building Initiative. …And as technology companies drive a greater share of office leasing, a growing number of landlords are turning to WiredScore to validate the technological proficiency. …Hines, a real estate developer based in Houston, has long been a believer in LEED and has adopted WiredScore standards. In Atlanta, the firm is nearing completion of T3 West Midtown, a timber office building with WiredScore’s highest certification.