In urban areas, one way of mitigating the adverse effects of air pollution is the sustainable rooftop practice known as green roofs. How green roofs can help reduce carbon emissions in urban areas, directly and indirectly, is the focus of this review, which draws on recently published studies. The direct impact of green roofs on carbon sequestration involves vegetation and soil media, which can capture and store air pollutants on a building scale. The indirect impact includes the long-term green roof effect, which can include reducing building energy consumption, leading to a reduction in fossil fuel consumption. Consequently, this process could reduce CO2 emissions around the globe. According to the literature analysis, the indirect long-term benefits help promote green roofs as a green practice around the world. It was found that vegetation and soil properties are the key factors affecting the performance of building energy consumption reduction and CO2 sequestration. Stakeholders and the public are encouraged, based on the literature review results, to adopt green roofs in building construction projects as a climate mitigation strategy.