Book excerpt: This report is a comprehensive greenhouse gas inventory for both New York City as a whole & for City gov¿t. operations. While there is no substitute for fed. action, all levels of gov¿t. have a role to play in confronting climate change & its potential impacts, & this report will help N.Y. begin doing that more aggressively. Mayor Bloomberg created the Mayor¿s Office of Long-term Planning & Sustainability & charged it with developing a comprehensive sustainability plan for the City¿s future. The result is PlaNYC, which has set a goal of reducing missions by 30% below 2005 levels by 2030, an ambitious but achievable goal. This greenhouse gas inventory is a critical first step in reducing N.Y.¿s contribution to global carbon dioxide levels. Illustrations.