The best way to prevent this from happening is to re-think your views about it Title VII in the Civil Rights Act of 1964 prohibits employment discrimination according to race, color, religion, sex and national origin. Although the word 'color' is roofed as one of the many factors protected against discrimination, my work nationally and internationally continually surfaces an unconscious bias linked to pores and skin in spite of ethnicity. In the US, before 60?s and 70?s, the darker an African American person's complexion the unlikely see your face would reach a top status in the workplace; the lighter the complexion and straighter the head of hair a lot more likely teachers Black and White would favor that child. Although thankfully this bias is fading since it pertains to job advancement, research still indicates that young girls would rather have fair skin and believe dark skin isn't good and/or ugly. In the 80?s yet still present today, various media depict lighter skin discoloration fat loss attractive, and darker skin tone scary or dangerous. Used motor oil which has impurities and dirt is fed right into a centrifuge. The centrifuge carries a rotor that spins an incredibly high RPM (revolutions each minute) and it pushes the impurities to the wall in the container that houses the rotor. This works because the mass from the impurities is more than the mass with the oil particles. Appropriate extraction methods are used to ensure that impurities along with the clean motor oil are properly separated, and the oil is able to be re-used. These filtering systems can also be suitable for use with small-scale biofuel setups to get rid of any impurities. The manifestation of love that was deemed to be exclusive between men and women is now exercised by even the same sexes together.