Choice of activity data

TIER 1 METHOD

The Tier 1 method requires only the amount of zinc produced in the country, and if available, the process type. These data may be available from governmental agencies responsible for manufacturing statistics, business or industry trade associations, or individual zinc companies. These tonnages can then be multiplied by the default emission factors to estimate CO2 emissions.

TIER 2 METHOD

The Tier 2 method requires the calculation of a country specific emission factor based on the total amount of reducing agents and other carbon containing process materials used for zinc production in the country. These data may be available from governmental agencies responsible for manufacturing or energy statistics, business or industry trade associations, or individual zinc companies. These country specific emission factors can then be multiplied by the production amount to determine total CO2 emission from the sector. If this is not a key category and data for total industry-wide reducing agents and process materials are not available, emissions can be estimated using the Tier 1.

TIER 3 METHOD

The Tier 3 method requires collection, compilation, and aggregation of facility-specific measured emissions data, if any. However, activity data collected at the plant-level can also be used, with separate emission factors for each plant multiplied by plant specific production. If this is not a key category and data for total industry-wide reducing agents and process materials are not available, emissions can be estimated using the Tier 1.

Figure 4.16 Decision tree for estimation of CO2 emissions from zinc production

Figure 4.16 Decision tree for estimation of CO2 emissions from zinc production

Note:

1. See Volume 1 Chapter 4, Methodological Choice and Identification of Key Categories (noting Section 4.1.2 on limited resources), for discussion of key categories and use of decision trees.

Note:

1. See Volume 1 Chapter 4, Methodological Choice and Identification of Key Categories (noting Section 4.1.2 on limited resources), for discussion of key categories and use of decision trees.

Was this article helpful?

0 0
Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

Get My Free Ebook


Post a comment