Second, with respect to economic governance, considerable improvements are equally needed in the formulation and implementation of measures and mechanisms that deliver public commodities, which inter alia: can reduce CO2emissions. For instance, availability of a good public transport system can substantially limit the emission of greenhouse gases. Hence, the government has to be more effective in the provision of public services that are of quality, limitation of political pressures on civil servants, quality of regulations, effective implementation of corresponding regulations and the relevance of credible governments in overseeing the implementation of underlying regulations. Moreover, such policies should also be tailored to favour competition in private sector development because such competition is
17 necessary to offer citizens with the best options for improving their livelihoods while at the same time reducing their carbon footprints. Third, on the front of institutional governance, in order for both domestic and foreign stakeholders to have confidence in domestic institutions, both citizens and the governments of sampled countries should respect institutions that govern interactions between them, especially those pertaining to CO2emissions. Hence, both citizens and the governments should be sanctioned in accordance with prescribed laws when they fail to respect rules and regulations designed to limit CO2emissions. It follows that the rule of law and the control of corruption should be strongly upheld. It is important to note that the study is recommending that these governance measures should be substantially increased in the sub-region because the unexpected findings could be traceable to the inability of countries in SSA to gain from the time and level hypotheses related to the favourable effects of good governance which, have been independently tested to confirm the existence of a non-linear nexus between democracy and governance quality in developing countries (Sung, 2004; Asongu, 2014). Concerning the level of democracy hypothesis, it has been established that governance quality is highest in states where democracy is strong, average in authoritarian states and least in partly democratised states (Sung, 2004;Back & Hadenius, 2008; Asongu & Nwachukwu, 2016e). The time of exposure hypothesis maintains that young democracies have worse governance standards compared to authoritarian regimes, unlike old democracies which are associated with the best governance standards (Keefer, 2007). These level and time hypotheses are relevant to sub-Saharan Africa because democracies in the sub-region are young and the advent to multiparty politics began for the most part, only after the fall of the Berlin Wall in 1989. It follows that with time, when governance standards are improved in the sub-region, they can be expected to increase environmental quality by means of decreasing CO2emissions. Governments in sampled countries can fast-track the process by implementing the recommended policies pertaining political, economic and institutional governance.