This new emission model will estimate emissions for on-road and nonroad mobile sources, cover a broad range of pollutants, and allow multiple scale analysis.

In addition one of the study's authors, Eileen Nic, said that companies were allowed to estimate, rather than measure, emissions and that there was no program to verify the figures.

EPA provides an online calculator for estimating personal emissions.

These models are methods used by EPA to estimate emissions from on-road vehicles, nonroad sources, and fuels.

They must have in place a national system for estimating emissions and removals of greenhouse gases within their territory.

Within IPCC the National Greenhouse Gas Inventory Program develops methodologies to estimate emissions of greenhouse gases.

The decree specifies how Brazil quantifies greenhouse emissions, how it will achieve the reduction, and a legal requirement for estimating annual emissions.

Modeling is EPA's method for estimating emissions from on-road vehicles, nonroad sources, and fuels.

In addition, Kentucky estimated emissions of 0.4 MMTCE from biofuels.

By comparison, the E.P.A. estimates emissions at 272 million to 414 million gallons annually.