Which innovations and ideas of muslim scholars could still be used today?

 The correct answer is :  Use of water resources such as: irrigation systems, dams, canals, underground wells and aqueducts. The use of medication such as: antiseptics and various medications. The types of dienes in decorative art such as: geometric, floral design, patterns and various shapes. Achievements in medicine such as: the establishment of hospitals with separate rooms and teaching centers, anyone can receive treatment, surgeries, the use of needle, thread and stitches after surgery. Contributions in mathematics, algebra, geography and navigation. They made the division of the regions by climatic zones, created very precise maps with commercial routes.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.