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Moreover, PHEVs can significantly reduce greenhouse gas emissions and air pollutants compared to conventional vehicles. Studies show that, when charged regularly and used primarily in electric mode, PHEVs can lower CO2 emissions by up to 50% or more, depending on the source of electricity. This reduction in emissions contributes to improved air quality, particularly in urban areas where traffic congestion is a significant issue. With governments and organizations around the world prioritizing efforts to combat climate change, PHEVs represent an important step toward achieving sustainable transportation goals.
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However, the square manhole cover does come with its own set of challenges. Theoretically, if a square cover is positioned diagonally over the hole, it could fall through. This poses a risk that is inherently absent with round covers. Thus, the use of square manhole covers can be seen as a compromise—acknowledging both aesthetic and practical concerns while also embracing the complexities of urban infrastructure.
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