NYC Unveils Greenhouse Gas Reduction Plan

New York City Mayor Bill de Blasio has announced a plan for the city to significantly reduce its greenhouse gas by 2050, starting with efforts to make the city's buildings more energy efficient.

De Blasio unveiled the retrofitting plan on Sunday, the same day as a march focusing on global warming was scheduled to take place in Manhattan.

Most of the city's greenhouse gas emissions can be traced to the energy needed to power electrical, heating and cooling systems in its buildings.

The plan calls for about 3,000 city-owned buildings that have "significant" energy use to be retrofitted by 2025. That includes schools, hospitals and libraries. The city will also offer incentives for private owners to upgrade their buildings.

On Friday, New York's City Council proposed a package of bills aimed at slashing greenhouse gas emissions, taking cars off the road and shrinking the carbon footprint of city operations.