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The document explains the greenhouse effect and the role of human activities in increasing radiative forcing, noting that global warming has reached approximately 1°C since pre-industrial times. It details the global emissions profile by sector and the projected risks associated with 1.5°C versus 2°C warming, emphasizing that the latter significantly increases risks to human health, food security, and biodiversity. The text outlines the evolution of international climate governance from the UNFCCC and Kyoto Protocol to the Paris Agreement and its Nationally Determined Contributions (NDCs). To limit warming to 1.5°C, the document argues for a transformative shift in the energy mix by 2050, including a drastic reduction in fossil fuel consumption and a move toward renewable energy and carbon dioxide removal technologies.