Paper Title
Efficiency Analysis of The Nexus Between Climate Investments and Air Pollution

Abstract
The paper aims to answer the question of how efficient the EU countries are in channeling public climate investments for mitigating GHG emissions. It is followed the Data Envelopment Analysis methodological framework to compute the efficiency score and investigate the positioning on the best practice frontier of the 27 European Union countries from 2020 to 2023. By analyzing historical data, one conclusion is that Denmark, Luxembourg, and Ireland persistently record the highest GHG emissions. The DEA findings show that Denmark occupies the best position, always placed on the best practice frontier with an efficiency score of 100%, and hence acting as a benchmark for the other countries. Luxembourg exhibited fully efficient conduct in 2020 and 2021, while Ireland achieved efficiency in 2022 and 2023. When computing the 4-year average efficiency score, it appears that most EU countries register a below-average efficiency, the smaller the score the highest the inefficiency in achieving the climate target of curbing gas emissions.