The answer is : temperature estimated using any of several methods. The most important variable in reconstructing ancient climate is temperature estimated using any of several methods.
China has the most people
Egypt has a mixed economic system which includes a variety of private freedom, combined with centralized economic planning and government regulation.
☞In a command economy, the government controls major aspects of economic production. The government decides the means of production and owns the industries that produce goods and services for the public. The government prices and produces goods and services that it thinks benefits the people.
