In 2013, we worked on creating an inventory that was sufficiently exhaustive to be of use in responding to the Carbon Disclosure Project (CDP) Climate Change Questionnaire, with the support of expert consultants in the field.

Since this is the first year we conducted an inventory of carbon covering most of our scope 1 emission sources, we have decided to use this calculation to establish a baseline, based on two precepts:

1. In the construction business, the vast majority of our emissions come from the projects, and predicting the flow of projects, which depends on many factors beyond this company's control, is a highly complex task. Furthermore, emission intensity can vary over the course of a project's life, so it is difficult to establish a baseline in terms of absolute emissions to serve as a parameter for comparing one year against another.

We prepared a normalized baseline referring to man-hours worked (MHW) in the same period. This baseline represents a clear indicator of the efficiency of our operations and enables us to compare projects over time.

2. Our Civil Construction business contributes the largest percentage of our profits and is the most representative of our operations. It is also the division that yields the most detailed body of information (even at the independent project level), so we decided to use it as a reference for the rest of our company and establish our normalized baseline based on its record of emissions and man-hours worked.

ICA's normalized baseline for scope 1 is:

Linea base 2013
ICA Scope 1



To prepare the greenhouse gases inventory, we used the World Resources Institute (WRI) and World Business Council for Sustainable Development (WBCSD), the GHG protocol, as well as emission factors from prestigious international sources such as:

  • • 2012 Guidelines to Defra / DECC's GHG Conversion Factors for Company Reporting
  • • AP42 Fifth Edition, Volume I, Chapter 12: Metallurgical Industry
  • • Masera, O.R., M.J. Ordoñez y R. Dirzo. 1997, "Carbon Emissions from Mexican Forests: Current Situation and Long-term Scenarios", Climatic Change 35, P. 265-295, SARH, México
  • • The Climate Registry 1/05/09 General Reporting Protocol 1.1