In 1950, about 15% of the Earth's land surface was covered by rainforest. In fewer than fifty years, more than half of the world's tropical rainforests have fallen victim to fire and the chain saw, and the rate of destruction is still accelerating.
The Big Mac was first introduced in 1967 by Jim Delligatti, a McDonaldâs franchisee from Pennsylvania, and the following year was available nationwide. McDonaldâs is continuously testing and innovating to meet its customersâ needs.
Big Mac Index. The Big Mac Index is published by The Economist as an informal way of measuring the purchasing power parity (PPP) between two currencies and provides a test of the extent to which market exchange rates result in goods costing the same in different countries. It seeks to make exchange-rate theory a bit more digestible.