Globally 70% of carbon dioxide (CO2) emissions are from urban areas. CO2 it is emitted from the combustion of carbon based fossil fuels in vehicles, power plants, generators, concrete plants, etc. CO2 is also is taken up by trees and respired from soils in the city.
Local Law 97 will require dramatic cuts in carbon emissions in NYC over the next few years. We will measure CO2 around the city to track those changes.