Final answer:
To reduce atmospheric CO₂, measures include using less fossil fuel, embracing renewable energy, technological solutions like carbon capture and storage, and extensive reforestation. Government policies can support these efforts through subsidies and mandates.
Step-by-step explanation:
To actively reduce existing atmospheric CO₂ stock, several measures can be implemented. Firstly, limiting the use of fossil fuels and shifting to renewable energy sources like solar and wind can significantly cut down on CO₂ emissions. Advances in technology, such as carbon capture and storage (CCS) and direct air capture, can also help by removing CO₂ directly from the atmosphere or capturing it before emission from industrial sources.
Furthermore, embracing extensive reforestation and supporting forest conservation efforts can enhance the natural capacity of these ecosystems to absorb CO₂. Governments can play a crucial role by creating policies that support these initiatives, such as subsidies for clean technologies or mandates for carbon sequestration.
Additionally, mitigation strategies to stabilize and reduce carbon emissions are crucial for tackling the increasing trend of greenhouse gas emissions since the industrial era.