Non-CO2 greenhouse gases include many substances, such as methane (CH4), nitrous oxide (N2O), fluorocarbons (CFCs, HFCs, SF6, etc), black carbon, aerosols, and tropospheric ozone (O3). These contribute significantly to climate forcing. Reducing non-CO2 greenhouse gas emissions is often more cost-effective than reducing CO2 emissions.
The scope of NCGG8 will be global challenges, and local solutions. The NCGG conferences pay attention to:
sources, sinks, and atmospheric processes of non-CO2 greenhouse gases;
mitigation options and emission reduction technologies and practices;
policies and measures, both in the public and private sectors; and
the science-policy-industry interface.
formation and aerosols add to this list.
The previous NCGG7 led to the following conclusions:
Large emission reductions in GHG needed to limit warming to 2 degrees
The window for action is rapidly closing
Focus of climate policy is (too much?) on CO2
Non-CO2 GHG emission reduction is very needed and possible and deserves more attention
Non-CO2 GHG emissions can be reduced at relatively low costs
The NCGG8 conference will bring together scientists and engineers on the one hand, and decision makers in the public and private sectors on the other hand. As such, it will actively support the implementation of promising policies and technologies to reduce NCGG-emissions. Special attention will be paid to the Climate Convention, and to the UN Sustainable Development Goals.