Amazon rubber boom the expansion of Iquitos in Peru. The rubber boom occurred largely between 1879 and 1912. There was heightened rubber production and associated activities from 1942 to 1945 during the Second World War. Natural rubber is an elastomer, also known as tree gum, India rubber, and "caoutchouc," which comes from the rubber tree in tropical regions. Christopher Columbus was the one of the first Europeans to bring news of this odd substance back to Europe, but he was not the only one to report it. Around 1736, a French astronomer recalled how Amerindians used rubber to waterproof shoes and cloaks. He
Natural borrowing limit exactly up to the amount which they earn for their lifetime. If students are only allowed to borrow less than $6,000,000, then it is said that they face a borrowing limit tighter than the natural borrowing limit. One caveat is that the concept natural borrowing limit does not depend on what amount of money that law students borrow. In this example, they will not borrow more than $200,000, but, as long as they are "allowed" to borrow $6,000,000, then it is enough to say students are in the natural borrowing limit world. The natural borrowing limit is one type of