Health and safety laws will deal with such things as: the temperature in the workplace (it must not be too hot or too cold), things on the floor that people could fall over, or things that could catch on their clothing and cause an accident, smoking in the workplace and other things that might cause pollution or which might be fire hazards, how many toilets per person there should be, whether they need safety equipment (e.g. hard hats in case anything falls on their heads), whether it is safe for a person to be left alone in the workplace, the rights of disabled people, how many hours in the day people can work for etc.