1 Substance abuse. Abuse of drugs and alcohol can contribute to panic disorder.  Major life stress. Stressful events and major life transitions, such as the death of a loved one, can sometimes trigger panic attacks, which can potentially recur and go on to become panic disorder.
Zero emission refers to an engine, motor, process, or other energy source, that emits no waste products that pollutes the environment or disrupts the climate. Contents.
Otherwise, recycling will be a high priority for the city. There will be no cars in Masdar City to contribute to the release of carbon dioxide. Supposedly, people living and working in Masdar City will never be farther than 656 feet (200 meters) from transportation [source: Wordsworth ].