Why they are dangerous?

Nuclear engineering areas
 

1- Nuclear reactors and the waste stored on the site are effectively pre-deployed nuclear weapons in the event that malicious people decide to blow one up .

2- Every nuclear power reactor makes massive amounts of radioactive waste.

3- Every radiation exposure increases our risk of cancer.

Petroleum engineering areas

1- leaking of gases can cause choking and death.

2- any spark can cause huge fire explosion .

3- The chemicals in the oil ore cause health problems and diseases.

Mining engineering areas 

1- block out or failing rocks in the mine because of many reasons such as earthquakes.

2- lack of oxygen can cause choking and difficulty in breathing.

3- high temperature and  preasser can cause health problems such as hearing problems.

Industry factories engineering

1- dealing with furnace high temperatures degrees can be harmful.

2- high vibration and loudness sound of machines case health problems.

3- the welding and cutting can be harmful for the eyes of cut your fingers.

Civil engineering areas 

1- the heavy tools can dropped on you. 

2- sometimes in high-roofs can be dangours because the faling or the wind force.