This from 1010 Wins:

NEW YORK (AP) — New York
City produces nearly 1 percent of all greenhouse gas emissions in the
nation, equal to the level of countries including Ireland and Portugal,
officials said Tuesday after releasing a study of the city’s output.

The report found that the buildings, subways, buses and cars and the
decomposition of waste in America’s biggest city produced a net
emission of 58.3 million metric tons of greenhouse gases in 2005. It
said the U.S. total was 7.26 billion metric tons for that year.

Carbon dioxide, methane and other gases essentially trap energy from
the sun, which warms the Earth’s surface and lower atmosphere. Human
activity that increases those gases is believed to be changing the
climate of the planet.

The Intergovernmental Panel on Climate Change, a United Nations
network of 2,000 scientists, warned last week in a global warming
report of possible catastrophic risks such as floods, disease, food
shortages, species extinction and human suffering throughout the world.

Mayor Michael Bloomberg, who is limited to two terms and leaves
office at the end of 2009, ordered the study of the city’s emissions
because he needed a benchmark for his goal of a 30 percent emissions
reduction by 2030. The study was conducted by the mayor’s Office of
Long-term Planning and Sustainability.

"You have to have a real baseline or we’re just talking past each
other as to what works and what doesn’t work — we won’t ever know
whether we really made a difference,” Bloomberg said.

Considering the city’s share of the U.S. population — 8.2 million
of 300 million — the levels could be much worse. And there is good
news: The average city resident contributes less than a third of the
emissions generated by a typical American.