Edema has many possible causes: 1  Prolonged standing or sitting, especially in hot weather, can cause excess fluid to accumulate in the feet, ankles and lower legs. 2  Tiny valves inside the veins of the legs can become weakened, causing a common problem called venous insufficiency.
Cars with nitrous-equipped engines can be identified by the purge of the delivery system that most drivers perform prior to reaching the starting line. A separate electrically operated valve is used to release air and gaseous nitrous oxide trapped in the delivery system.
The Purge is a 2013 American dystopian horror film written and directed by James DeMonaco and is the first installment in The Purge franchise. The film stars Ethan Hawke, Lena Headey, Adelaide Kane and Max Burkholder as a family held hostage during The Purge, an event during which all crime is legalized for 12 hours. Despite mixed reviews, the film was commercially successful, grossing $89.3 million, far surpassing its $3 million budget.