However, overall economic activity has increased more rapidly, resulting in higher total carbon emissions. (ipcc.ch)
To relate climate uncertainty to mitigation, it is helpful if we first consider the relationship between total carbon emissions and the expected peak temperature increase. (shapingtomorrowsworld.org)
Globally, ammonia production already accounts for 3 - 5 percent of total carbon emissions, according to some sources. (scientificamerican.com)