We empirically investigate the effect of the <i>Transatlantic Trade and Investment Partnership</i> on the per capita emissions of eight air pollutants and municipal waste. By introducing the same explanatory variables and applying the same empirical strategy and methodologies as in Qirjo and Pascalau (2019), we provide robust evidence suggesting that the implementation of the partnership could be beneficial to the environment because it may reduce per capita emissions of CH<sub>4</sub>, hydrofluorocarbons/ perfluorinated chemicals/ SF<sub>6</sub>, N<sub>2</sub>O, NH<sub>3</sub>, and SF<sub>6</sub> for a typical partnership member. This result is based on statistically significant evidence showing that, on average, the pollution haven motive based on national per capita income variations is dominated by the factor endowment argument based on the Heckscher-Ohlin trade theory and the pollution haven motive originating from an inverse measurement of national population density differences. However, we also report statistically significant evidence that the implementation of the partnership could denigrate the environment by increasing per capita emissions of SO<sub>2</sub> and municipal waste.