What would be the most likely result if humans stopped during fossil fuels?

If humans ceased the use of fossil fuels, the most immediate result would be a significant reduction in greenhouse gas emissions, leading to positive impacts on climate change and air quality. However, there would also be substantial challenges, including disruptions to transportation, energy production, and economic systems reliant on fossil fuels. Transitioning to renewable energy sources would be essential to sustain modern lifestyles and economies, potentially leading to innovations in technology and infrastructure. Overall, while the environmental benefits would be profound, the societal and economic adjustments would be considerable.