This study adopts airflow management technology to improve the local temperature distributions in an automobile to counteract the greenhouse effect. The automobile's temperature can be reduced to almost the outside temperature before the driver or passenger gets into the vehicle. When the engine is idling, the greenhouse-control system,can be activated to remove the hot air from the car. An appropriate negative pressure is maintained to prevent stuffiniess, and save energy. The greenhouse-control system requires electrical power when the engine is. idle,, and a battery cannot supply sufficient power. An auxiliary solar-power supply can save energy and reduce the greenhouse effect of sunlight, while creating a comfortable traveling. environment. It ensures that the engine is not overburdened and increases its service life, conserving. energy, protecting the environment and improving comfort. (C) 2004 Elsevier Ltd. All rights reserved.