As new scientific breakthroughs emerge in the quantum physics field, quantum computing evolves from theoretical concepts and constructs to practical innovations. However, the questions surrounding its impact on environment and sustainability remain largely unanswered. The object of the current paper is to assess the carbon footprint of quantum computing technologies and to analyze their impact on the environment. More than this, the study aims to explore the alignment of such technologies with global sustainability goals. Specifically, the research paper will aim to identify key sources of energy consumption and emissions across the quantum computing lifecycle, including hardware manufacturing, cryogenic cooling systems, operational energy usage, and quantum circuit simulation. The research methodology adopted in this study is a qualitative approach based on extensive review of peer-reviewed scientific literature, environmental assessments, and benchmarking frameworks tailored to carbon emissions measurement. A comparative analysis between quantum computing and classical high-performance computing is conducted to evaluate energy efficiency and environmental impact in different realistic scenarios. This paper provides original perspectives into the often-overlooked environmental dimension of quantum computing, contributing a comprehensive view on sustainability challenges and opportunities. By highlighting the importance of environmental impact assessments, this study supports the development of greener, more responsible quantum innovation.