The initial step in creating a safe working environment is to be fully compliant with all the Health and Safety legislation.
As everybody already guessed the legal aspects of this complex subject vary from country to country and are continuously in progress. But some fundamentals are widely agreed and are the pillars of the Europian Union standards for most of the working activities. Therefore they must be followed strictly, no matter the country and the specific field of interest.
The following video will give a precious introduction to the internationally agreed requirements.