23.2 CO2 calculator

Claus Werner Nielsen , 1331 Environmental Studies, COWI, Århus, Denmark
Ole-Kenneth Nielsen , National Environmental Research Institute, Aarhus University, Roskilde, Denmark

Title: CO2-calculator


Many countries are in the process of mapping their national CO2 emissions, but only few have managed to produce an overall report at municipal level yet. Denmark, however, has succeeded in such a project. Using a new national IT-based calculation model, municipalities can calculate the extent of their CO2 emissions and identify ways to reduce them.

This allows them to compare their CO2 emissions between themselves, as well as with other municipalities in the EU.

”The Danish CO2 calculation methodology for municipalities is based on EU and UN requirements for national emission reporting. The Danish CO2 calculation methodology may serve as the missing benchmarking tool for municipalities within the EU and the UN,” says Anne Mette R. von Benzon, project manager at COWI, the person behind the model.

In autumn 2007, the Danish Ministry of the Environment, the Ministry of Climate and Energy and Local Government Denmark (LGDK) decided to develop a nationally recognized methodology that would allow Danish municipalities to map CO2 emissions on a uniform basis. The model take into account all municipal operations with a Green House Gas emission or which serve as a carbon sink i.e. heat and power production, transport, agricultural, forestry, land use, commercial energy use and citizens' use of energy and heating supplies, waste production and industrial processes with CO2 emission (production of cement, glass and ceramic products) or emission of solvents.

The CO2 calculator has also included a catalogue of tools and methods to reduce CO2 emissions within areas such as waste, traffic, agriculture and nature and the program can calculate CO2 reduction potentials for these mitigation measures.

The CO2-calculator has been developed in a co-operation between the National Environmental Research Institute (NERI) and COWI.