Y! Green: Hawaii is green, or so its boosters tell you incessantly. Of course, you have to ignore the thick smoke from the sugarcane-field-burning operations and the runoff chemicals used to control roadside plants, mountains of tourism-generated waste, plus a huge complement of invasive species. An encouraging sign is the 30-megawatt wind farm visible from most parts of Maui, providing 10% of the island’s electricity. Unfortunately, most of the rest is from diesel oil. But during a …