Carbon emissions research focuses on understanding sources, trends, impacts and mitigation strategies for greenhouse gases, especially carbon dioxide and methane.

Globally, emissions from burning fossil fuels for energy and transport remain the dominant source, followed by industry, buildings and agriculture. Land use change, particularly deforestation, also releases large amounts of carbon previously stored in biomass and soils. Data show that atmospheric CO2 concentrations have risen rapidly since the industrial revolution, closely tracking human use of coal, oil and gas.

Scientists reconstruct past climate using ice cores and other proxies to compare current greenhouse gas levels with natural variability. Present concentrations and the speed of increase are unprecedented over hundreds of thousands of years. This sharp rise is tightly linked to global temperature increases, more frequent heatwaves, changing precipitation patterns and accelerating sea level rise.

Research highlights the role of feedbacks, such as melting permafrost releasing additional greenhouse gases, which could amplify warming. It also emphasizes the limited global carbon budget remaining to keep warming below critical thresholds, making near term emission cuts essential.

Mitigation studies assess pathways to reduce emissions through energy efficiency, electrification, renewable energy, improved industrial processes, changes in food systems and protection and restoration of forests and other ecosystems. Carbon pricing, regulations, innovation support and behavioral changes are analyzed as policy tools.

Finally, scientists evaluate negative emission options such as afforestation, soil carbon enhancement and engineered carbon capture, while noting uncertainties, costs and risks. Overall, the research converges on the need for rapid, sustained and equitable reductions in carbon emissions to limit long term climate damage.