anchor: Air quality modelers and researchers have responded to the need for scientifically valid and reliable estimates of air quality changes by developing a number of sophisticated atmospheric dispersion and transformation models.
positive: By developing sophisticated atmospheric dispersion and transformation models, researchers have filled a need for valid and reliable estimates of air quality changes.
negative: Lobbyists are claiming that air quality modelers and researchers have failed to respond to the need for scientifically valid and reliable estimates of air quality changes.