In such a fine powdered form, iron can burn, due to its increased surface area. The primary utility of iron filings is in the study and teaching of magnetism and electromagnetic fields. The substance makes impressive demonstrations when sprinkled on a white card placed on top of a permanent magnet, such as a bar magnet.
Here are a few of the specific jobs that are unsafe for pregnant women: 1  Farming. 2  Dry Cleaners. 3  Factory work where there is chemical exposure, too much heavy lifting, or a risk for falls. 4  Print Shops. 5  Craft shops that expose you to drying chemicals, paints, etc.6  Highway worker. 7  Toll Booth operators.8  Construction.obs that are unsafe for pregnant women include: 1  Any job where you are working with hazardous chemicals such as pesticides, toxic cleaning solutions, lead, second hand smoke, etc. 2  Any position where you are doing heavy lifting.
By Dr. Mercola. If you're a pregnant woman, avoiding exposure to environmental toxins is one of the most important steps you can take to protect your developing baby.In fact, avoiding toxic exposures while pregnant is equally as important to your baby's health as your healthy diet, stress management, safe exercise, and sound sleep.n a survey of more than 2,500 US obstetricians on the topic of prenatal environmental exposures, the majority (78 percent) agreed that they could reduce women's exposure to environmental health hazards by counseling their patients.