This lack of modern energy acts as a major brake on efforts to reduce poverty, improve health, education, gender equality and a range of other positive economic and social outcomes. (iea.org)
Simply put, dark energy acts to push matter away from each other, while gravity acts to pull matter together. (newscenter.lbl.gov)
When a car is run at part throttle, this interruption in the airflow causes excess vacuum, which causes the engine to use up valuable energy acting as a vacuum pump. (en.wikipedia.org)