The primary goal is a compromise between power, fuel economy, and emissions, and in most cases is achieved by an air-fuel-ratio close to stoichiometric.

Modern engines employ the use of an ECM to provide the best balance between performance and emissions.

It is unclear whether such a recovery plan could avoid addressing the link between manmade emissions of heat-trapping gases and the increase in Arctic temperatures.

In Great Smoky, for example, air quality scientists have found strong correlations between emissions from the Tennessee Valley Authority's power plants and pollution in the park.

The ratio of hopanes and steranes to elemental carbon can be used to distinguish between emissions of gasoline and diesel engines.

The difference between GDP and emissions was mainly driven by:

So there is a substantial delay between emissions and the actual temperature impact.

The memo showed Cooney had repeatedly edited government climate reports in order to play down links between emissions and global warming.

Ultimately, however, policies informed by an understanding of the relationships between technology, economic growth and emissions will prove more helpful than alarmist rhetoric in addressing these trends.

To do so, the brain must simultaneously control both the sum and the difference between emissions from the right and left sides of the brain.