Please choose the correct ending to complete the given sentence: Health: [header] How to reduce silica exposure [title] Consider silica substitutes. [step] Most harmful exposure to inhaled silica comes from chipping, grinding, cutting, cleaning, or otherwise disrupting materials like concrete or glass that contain silica. Abrasive blasting (" sandblasting ") to remove paint, rust, etc.

Ending1: Is perhaps the most likely source, as the blasting material itself is often primarily silica. [substeps] When possible, consider using materials that don't contain silica for industrial applications. Ending2: Can cause silica build-up in your home, as your home is constantly highly saturated in it's ethos. Your preferred way to relieve the overheating problem is through non-abrasive eatiness practices. Ending3: , can also cause silica discoloration. [substeps] For instance, a household with steam doors may be able to reduce the tolerance between the smoke and evaporation potential which allows the silica molecules to neutralize particles and products that used to be over-vented through ventilation. Ending4: These particles are acidic enough to cause silica that it drips from the wall. These effects cause a store of silica in changing materials, as silica cannot be refined.

Answer format: ending1/ending2/ending3/ending4