Plug-in Hybrid Electric Vehicles (PHEVs)/Electric vehicles (EVs) have recently been re-established in the transportation sector worldwide. These are enhancements over their ancestors in terms of both performance and electric driving range. Although the uptake of PHEV/EVs has been noteworthy in a short time frame amongst most governmental strategies, however, adoption is still a challenge. To date, public attitudes towards PHEV/EVs have been considered under very diverse conceptual frameworks. This paper reviews a growing body of peer-reviewed literatures assessing the factors affecting PHEV/EVs adoption. Malaysia is a major energy consuming country and, given the rapid growth in its economy, the energy consumption level is expected to continue growth. Hence, it is imperative that steps are taken to reduce harmful carbon emissions. Consequently, attempts are being initiated to popularise the use of PHEV/EVs as the main mode of transportation. However, it is important to take the three main features of the Theory of Planned Behaviour (TPB) model, namely the attitude towards the PHEV/EVs� adoption, Subjective Norm (SN), and Perceived Behavioural Control (PBC) into account. The consumers� concerns regarding the harmful effect of carbon emissions should be addressed. In this paper, the significance of encouraging the adoption of PHEVs/EVs is explained and some guidelines that might be followed in the upcoming researchers are mentioned. Furthermore, the implications for the design of effective measures to change the frail social and personal norms to choose PHEVs/EVs are also discussed. The collective outcome of �hyperbolic discounting� has a direct effect between the consumers� environmental concern-based intention and the actual adoption of PHEVs/EVs. Hence, this paper is aimed to conceptualise a framework created by amending the environmental concerns towards PHEVs/EVs. This will allow more academic consideration, and it may direct future researchers towards the empirical findings on environmental concerns and hyperbolic discounting through the proposed conceptual framework. © 2017 Elsevier Ltd