Aluminum, though surprisingly lightweight, reigns supreme as the most abundant metal in Earth's crust. Clocking in at an impressive 8.23% by weight, aluminum makes up a substantial chunk of our planet's composition. Interestingly, despite its prevalence, we cannot breathe aluminum - unlike oxygen that makes up about 21% of the air we breathe, aluminum is found combined with other elements in minerals and rocks. To get more update you can visit this www.yonglongalu.com site.