An endangered world

The state whereby the human population rises to an extent exceeding the carrying capacity of the ecological setting.

• Death rate

• overpopulation

• sewage

A statistic that tells you how many people live in a certain area, reported in square miles or kilometres.

• Birth rate

• overpopulation

• Population density

The percentage of people aged 15 years and over who are able to read and write with understanding a short simple statement on his/her everyday life.

• literacy rate

• greenhouse effect

• Population density

It happens when certain gases—known as greenhouse gases—collect in Earth's atmosphere.

• desertification

• greenhouse effect

• Population density

The number of people who die in a particular group or area in a given time, usually expressed as a quantity per 1000 of population.

• Birth rate

• greenhouse effect

• Death rate

The number of years a person is expected to live based on the statistical average.

• Life expectancy

• overpopulation

• Death rate

A type of storm called a tropical cyclone, which forms over tropical or subtropical waters.

• deforestation

• hurricane

• drought

It happens when water overflows or soaks land that is normally dry.

• deforestation

• hurricane

• flood

A stream of particles or electromagnetic waves emitted by the atoms and molecules of a radioactive substance as a result of nuclear decay.

• air pollution

• radioactive leak

• flood

A place where dangerous waste is left usually illegally.

• toxic waste dump

• hurricane

• flood