As of 2012, power plants existing worldwide represent roughly 300 billion tons of future CO2 emissions, assuming individual plants operate for a lifetime of 40 years. Moreover, committed emissions from the power sector have been growing globally at a rate of about 4% per year. This paper presents a formal method of commitment accounting that can inform public policy by quantifying future emissions implied by current investments.
Clearing and use of land produce GHG emissions, but these emissions happen over long periods of time. And during that time, the land may be useds in different ways to produce different products (e.g., corn, soybean, beef, wood, etc.) In this review, we demonstrate several methods of assigning land use emissions to specific products, and show that different methods have dramatically different results. Analysts should communicate their choices and consider the implications in light of their goals.
A global accounting of GHG emissions from 11 livestock categories and 237 countries. Beef production continues to cause far more emissions than do pork or chicken production, and global livestock emissions are growing--mostly due to increases in developing countries. Emissions per unit of meat produced is decreasing in most places, but not quickly enough to keep up with rising demand.
As much as one-third of Chinese air pollution is related to goods that are exported from China, and some of that pollution blows across the Pacific. We find that, while outsourcing of manufacturing from the US to China has probably improved air quality in the eastern U.S. (where such manufacturing was previously located), it therefore worsens air quality in the western US.