Q800. What factors could have influenced greenhouse gas trends?
A800. In In general, observed trends in greenhouse gas totals presented in GHGRP data are due to changes in data reported by facilities. However, for chemical pulp and paper mills (subpart AA) and suppliers of natural gas and natural gas liquids (subpart NN), changes to methods facilities use to determine their greenhouse gas data has had an impact on observed trends (click links to learn more about changes in each industry)
The annual variation in reported emissions generally is influenced by opening and closing of plants and processes, alterations or enhancements to manufacturing processes, and variations in annual production volume due to customer demand. However, for some industry sectors, EPA over time has adopted revisions to emission calculation methods for some sectors to reduce burden on reporters, simplify emission calculations, or improve the quality of the reported data. In some cases, these changes in calculation methods can impact observed trends.
| Wiki Markup |
|---|
{show-to:group=confluence-Users}{_}Footer / References Bar which is Visible to the public{_}{show-to} |
...
| Wiki Markup |
|---|
{show-to:group=confluence-Users}
{info}
Source: Revised to remove Subpart L references per Brian Cook, 9/28/2015, update per K. Chiu 10/10/18
Approval / Publishing History: Version 23, published 9/28/15, Version 4, published 10/16/18
Expiration: None
Relevant Subpart/Component: GHG Data and Publication
{info}{_}History Panel For Internal Use - Not Visible to the Public{_}{show-to} |