Which SSP scenario anticipates carbon dioxide emissions reaching double today's values by 2100?

The scenario that anticipates carbon dioxide emissions reaching double today's values by 2100 is SSP5. SSP5 represents a scenario characterized by high economic growth, where fossil fuel consumption is dominant due to the increased demand for energy and resources. This scenario envisions rapid technological advancements and robust economic development, leading to increased energy consumption, predominantly from fossil fuels, which results in significantly elevated greenhouse gas emissions.

SSP1 refers to a sustainable pathway aimed at reducing emissions and transitioning to renewable energy sources, while SSP3 describes a scenario with high challenges to mitigation and adaptation, resulting in higher emissions but not necessarily doubling them. SSP4 focuses more on inequalities and a fragmented approach to climate action, with potential emissions levels not projected to reach the doubling threshold as characterized by SSP5. Each of these scenarios outlines different pathways and outcomes based on societal, economic, and environmental decisions, but SSP5 is distinct for its expectation of substantial growth in emissions aligned with economic expansion centered around fossil fuel use.