humans already appropriate 30%-40% of all NPP as food, feed, fiber, and fuel, with wood and crop residues supplying about 10% of TPES

during the early 1980s humanity appropriated 32%-40% of terrestrial photosynthesis

And human actions have already changed the global nitrogen cycle much more than carbon cycling, and the ultimate consequences of this multifaceted change may be even more intractable than dealing with excessive CO2.

China could thus absorb all of the world's grain exports and still satisfy less than two-thirds of its demand.

All affluent countries have seen a relative decline in manufacturing, but in the United States these losses have gone farther than in Europe or Japan. The sector employed about 30% of the labor force during World War II, but by 2005 the share was less than 12%, compared to 18% in Japan and 22% in Germany

Second, the gasoline-fueled internal combustion engine, the most important transportation prime mover of the modern world, was first deployed (based on older stationary models) during the same decade as the Parsons machine, and it reached a remarkable maturity in a single generation after its introduction.

Deaths among adults raise this to at least 1.7 million fatalities per year.

warmer world could also produce a worrisome feedback by releasing significant amounts of soil carbon. Globally, soils store more than twice as much carbon as do plants or atmosphere, and because warming will accelerate decomposition and bring additional releases of CO2 from soils, this process could reinforce warming to an uncomfortable degree.

These gains include a large number of environmentally desirable changes and important health and socioeconomic benefits. Examples include less land destruction by surface coal mining, lower emissions of acid-forming gases, reduced chances for major oil spills,cleaner air in urban areas, improved visibility, and slower acidification of the ocean. By