9:15 a.m. Jon Corzine opens the Trade Fair section at the New York & New Jersey Minority Supplier Development Council’s Business Opportunity Expo; New York Marriott Marquis, 1535 Broadway.
10 a.m. Transportation Committee hearing on clean air taxis; City Hall, Committee Room.
10:30 a.m. Marty Markowitz keynotes New York City College of Technology graduation; The WaMu Theater at Madison Square Garden.
10:30 a.m. Meeting of the New York State Security or Fire Alarm Installer Advisory Committee; Department of State, Division of Licensing Services, 123 William St., 19th Floor Conference Room.
11 a.m. State and City health commissioners make announcement regarding impact of the cigarette tax hike; Children’s Museum of Manhattan, 212 West 83rd St.
11 a.m. Parks commissioner and the Swedish Consul General unveil 2007 American Nobel Laureates inscriptions at the Nobel Monument; Theodore Roosevelt Park, 81st Street and Columbus Avenue.
Noon. Taxi drivers protest high gas prices and credit card fees; B.P. gas station, Houston and Lafayette.
Noon. Verizon CEO Ivan Seidenberg speaks at the International Stop Cyberbullying Conference; Pace University’s Schimmel Theatre, 3 Spruce St.
12:45 p.m. Council Member Bill de Blasio calls on the Department of Education to immediately implement recycling in schools; City Hall Steps.
1 p.m. Street Organizing Coalition launches plans to stop street violence in Harlem; Marcus Garvey Park, 124th Street.
4 p.m. Parents protest siting of charter school their school’s building; outside Department of Education, 52 Chambers St.
6:30 p.m. The Wildlife Conservation Society’s annual gala celebrating India conservation efforts; Central Park Zoo.
8 p.m. Sacred Singers perform free concert to benefit the New York City Coalition Against Hunger; Carnegie Hall.
8:30 p.m. Department of Environmental Protection commissioner celebrates lighting of the digester “eggs” at the Newtown Creek Wastewater Treatment Plant; to get there enter Nature Walk at the corner of Provost Street and Paidge Avenue in Greenpoint. (7:30 p.m. Media tours; 9 p.m. Photo-op.)
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