Great white sharks. Trophic Pyramid Information that is in video: An ecological pyramid (also trophic pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or biomass productivity at each trophic level in a given ecosystem.
The risk is that you may not be able to remove all the acid and if it is left on the metal it will continue to corrode the metal. So to give you a quick answer, you can use vinegar to etch the aluminum, but you have to rinse the surface thoroughly to remove all the acid residue.
Apple Cider Vinegar. Apple cider vinegar is a natural diluted acid. As such, the vinegar works to safely burn a mole and removes it. Treatment generally involves daily application of apple cider vinegar to the mole until it has turned black and become a scab that falls off.brade the mole lightly with an emery board or the like, and then soak a cotton swab in apple cider vinegar. Avoiding the healthy skin, apply the vinegar to the mole until it turns white. You can do this several times a day, but take it slowly at first.