SWhen CityNAP, a San Antonio-based datacenter, opened last year, it bragged about its environmental credentials, such as buying its energy from a wind-power concern. "Sustainability and green business practices make good business sense!" thundered CityNAP president Frank Robles, shown here in the blue shirt, in a press release. Robles should have paid more attention to keeping CityNAP in the black: With assets of $100,000 and $460,000 in debt, CityNAP has filed for bankruptcy. CityNAP is contesting $230,000 in claims from its landlord. It's not easy being green.