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Greenhouse Gas Inventories for TribesMelinda Ronca Battista, ITEP

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GHG Emission Inventories

International Six Greenhouse Gases

Carbon Dioxide (CO2)

Methane (CH4)

Nitrous Oxide (N20)

Hydrofluorocarbons (HFCs)

Perfluorocarbons (PFCs)

Sulfur Hexafloride (SF6)

Last 3 mainly emitted by industrial processes

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GHG EIs – How to Calculate

TEISSIncludes GHG emissions for many sources common on reservation

Combustion sources (CO2, CH4, N2O)

Open burning of crops and refuse (CH4)

Some wood products industry sources (CO2)

Hot mix asphalt plants (CO2, CH4)

Fires, prescribed and wildfire (CH4)

Large generators (CO2, CH4)

Calculators don’t include all 6 GHGs but will have at least 1

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How to Calculate (cont.)

TEISSSome sources common on tribal lands don’t produce GHGs

Road dust

Gas stations

Grain elevators

Many sources produce just PM or VOCs

TEISS wasn’t built with GHGs in mind, but AP-42 included these GHGs, so they got into TEISS

Might not be comprehensive, but gives some results

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How to Calculate (cont.)Climate Registry

Covers all six International GHGs

Was created as GHG EI repository

Consumers calculate GHG productionInstead of calculating for power plant…

…calculate for building or business using electricity

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How to Calculate (cont.)

Climate RegistryCan also calculate for

Sources (power plants, boilers, etc.)Fleets of vehiclesDIRECT EMISSIONS

Consumers calculating based on electricity or fuel use

INDIRECT EMISSIONS

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How to Calculate (cont.)Climate Registry (TCR)

You join TCR

Can enter data directly into online emission calculators

Will provide reports and track historic emissions (you must enter historic data)

Annual fee

$750 for governments with budgets under 20 million

$1200 for governments with budgets 20 mil to 100 mil

And on up from there

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How to Calculate (cont.)

Climate Registry

To learn more

www.theclimateregistry.org

If using TCR, do regular EI in TEISS and create report for that

THEN enter data into TCR website

-TWO steps-

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GHG EIs - Reporting

EPA will require mandatory GHG reporting

Only for selected source types!The facilities themselves will be required to calculate their emissions and report to EPA.Owners or operators of facilities emitting more than 25,000 metric tons

That is: Boilers, engines, incinerators with maximum rated heat input capacity of more than 30 mmBtu/hr

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GHG EIs – Reporting (cont.)

EPA’s Mandatory Reporting RuleOwners or operators of facilities must report if emitting more than 25,000 metric tons CO2e from stationary fuel combustionHow big is that?

Emissions from annual energy use of about 2,200 homes58,000 barrels of oil 131 railcars’ worth of coal

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GHG EIs – Reporting (cont.)

What is a CO2e?Carbon dioxide equivalentUsed because some GHG’s more powerful than others

1 ton of methane warms as much as 19 tons of CO2

• 1 ton of SF6 warms as much as 21,682 tons of CO2

– Different compounds react to sunlight and heat from Earth differently

– All GHG accounting done in CO2e

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GHG EIs – Reporting (cont.)

• Why inventory GHG if you don’t have to report?– Awareness, knowing how your

activities affect climate change– Future emissions trading systems—you

can’t sell if you don’t know what you’ve got

– Identifying activities with biggest impacts so you know where to cut back

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GHG EIs - Summary

• TEISS calculates some GHGs, but not comprehensive

• Tribes can use services like The Climate Registry to inventory their GHGs

• Must inventory and report to EPA only if you own certain kinds of facilities