Want to become a member?  

Greenhouse Gas Calculator

NAPA's Greenhouse Gas Calculator, revised in 2012, calculates greenhouse gas emissions related to asphalt pavement manufacturing in a gate-to-gate analysis.  The user-friendly interface provides drop-down lists of typical fuels that are linked to greenhouse gas emission factors, expressed as carbon dioxide equivalents (CO2e), the universal measure of greenhouse gas emissions. 


The Calculator provides inputs for three separate fuels used by a rotary dryer plus three additional fuels used inside the facility by equipment, including vehicles.  A final category addresses CO2e attributed to electrical use, with unique factors for each state.  Fuel used for onsite power generation should also be included.  Generally, the more fuel combusted or burned, the more CO2-equivalent gases are emitted.


This beta update of the Greenhouse Gas Calculator adds emission offset credits for those fuels and activities that either reduce the amount of CO2e released or that sequester CO2.  Credits are calculated for plant-based bio-fuels, transportation credits for waste derived fuels like recycled fuel oil, and cradle to gate credits for recycled raw materials like RAP and shingles.  Credits are also calculated for reducing mix temperatures using warm mix asphalt technologies, based on user defined mix temperature.


The Greenhouse Gas Calculator was developed under the leadership of NAPA's Environmental Committee.  Refinements and enhancements will be made as need arises based on user feedback.  If you have suggestions for enhancements, or questions regarding underlying algorithms, please contact Howard Marks, NAPA Director of Environmental Affairs. 


For a more complete description of the Greenhouse Gas Calculator (GHGC), click here. Or click here to view a webinar that outlines the use of the revised calculator.



Access the Calculator NOW

If something happened with our soundness, we sure there is a solution to any situation in a cure. Most great factors for a good life is soundness. Factors that can predetermine your choice when you are ordering drugs are varied. There are divers efficient remedies available online. Very likely you know about medications that fights infection caused by bacteria. This type of drugs does not treat some contagion such as the common cold. Other medicines are used to treat diabetes. Cialis is a medicine prescribed to treat various illnesses. What do you have to study about cialis buy online? This article tell more about the symptoms of erectile dysfunction and where to buy cialis online. Sometimes men need medicines to resolve sexual malfunction. Sexual soundness problems can as a rule indicate serious problems in other area. Certain pop remedies can mean screwing with your hard-on. So if you are experiencing erectile problems, it is momentous to see a certified heartiness care producer immediately for a complete physical testing. The most common unwanted side effects of such medications like Cialis is headache. This is not a complete list of possible side effects and others may occur. If you would like advice about Cialis, one of pharmacists will make existing medications that are suitable for you to take. You will then be able to get the cure