Carbon capture and storage (CCS) is considered as a tool for limitation of anthropogenic carbon dioxide emissions in the atmosphere. For Latvia CCS may become both a tool for the minimisation of CO2 emissions and an economic tool, since – unlike Estonia and Lithuania – geological structures suitable for geological CO2 storage are available in Latvia. This factor makes implementation of CCS in Latvia possible in terms of technical ability and also makes it possible to provide CO2 storing „services” in geological traps for neighboring countries. The objective of the research is to develop a multi-criteria evaluation methodology to assess the implementation of low carbon technologies in Latvia’s energy transformation sector. Several methodologies are developed and approbated in the thesis: • methodology for evaluation of technical aspects to assess changes in fuel structure caused by CCS; • methodology for evaluation of economic parameters – to assess energy transformation costs for a full cycle CCS system and to determine impacts of CO2 emission allowances to energy production costs; • methodology for evaluation of environmental and climate aspects to identify environmental consequences caused by CCS. The target groups of the research are state institutions, energy companies, scientists, bankers and investors.