The clearing of trees.

The total number of people in a given area.

A writer.

In Buddhism, a state of perfect peace.

A major river in Northern India

The spread of desertlike conditions.

A measure of the number of people living in an area.

An area of tall grasses and scattered trees and scrubs.

The avoidance of violent actions.

A mixture of powders used in guns and explosives

Countries with strong economies and high quality of life.

The study of the world's physical features -its landscapes, bodies of water, climates, soils, and plants.

The most important language of ancient India.

People who move often from place to place

A desert in China and Mongolia

Countries with less productive economies and a low quality of life.

The worship of many gods .

A device that uses the position of shadows cast by the sun to tell the time of day.

Any material in nature that people use and value.

A canal linking northern and southern China

A type of government in which a single, powerful ruler has total control.

A person who performs religious ceremonies.

A large landmass that is smaller than a continent.

A resource that cannot be replaced naturally; coal and petroleum are examples

The value of all goods and services produced within a country in a single year.