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.
All Answers (5) Diesel engine pollute more only according to NOx and particulates emissions. They actually have much lower emission of CO. The high rate of NOx comes from the high temperature in the chamber which favors the oxidation of N. Particulates comes from the diffusion flame that diesel engine uses. They are created as droplets of fuel do not have enough time to evaporate while travelling toward the front flame and then pass through it. If you want, you could find more details in a reference I gave you in an other topic a few days ago. I think that the major problem in engine pollution for health are particulates.