The delegation of government fiscal expenditure is a significant avenue via which the required environmental quality is intended to be accomplished. Climate change is a big worry across the world. Every government is putting forth enormous effort to handle the problem in order to keep human occupancy across the globe. It is not out of place for the government to prudently allocate the necessary resources to Nigeria's three levels of government in order to maintain the environment. The government budget is the primary tool for capturing this expenditure obligation and enabling governments at all levels to bear it successfully. As a result, this study investigates the effectiveness of the three levels of government's fiscal obligations in reducing CO2 emissions in Nigeria. The study spans the years 2005 through 2020, with data analyzed utilizing numerous regression techniques and correlation. According to the data, state fiscal expenditure has a minor destructive impression on haze secretion management, however local government has a large deleterious bearing with smoke decline. On the other hand, federal government budgetary expenditure has a considerable and favorable influence on CO2 emission control. As a result, increased government resources are required to address the environmental pollution challenge. According to the report, all levels of government should invest heavily in green technologies in order to attain pollution-free living conditions. Fiscal spending delegation should apply pollution control adoption costs necessary for biodiversity conservation.