Climate change is a human-induced process, largely resulting from the emission of greenhouse gases (GHGs) such as carbon dioxide, methane and fluorocarbons. Countries are under increasing pressure to curb their emissions of these gases and to enhance carbon sinks in a drive to mitigate the effects of climate change.
However, combating the threats of human-induced climate change requires more than mitigation. It is equally important to reduce society's vulnerability to climate change through adaptation. Adaptation addresses the impacts of climate change, including climate variability and weather extremes.
Climate change is a top priority for the United Nations system itself. All United Nations agencies, funds and programmes are active to green the UN system.