Population and the Environment

What is population in geography?

Population is the amount of people in a defined area.

How is population density measured?

Population density is measured as the number of people per unit area, typically per km².

What are the key parameters for measuring population?

Key population parameters include distribution, numbers, density, and change.

What physical factors affect population growth?

Physical environmental factors include climate, soil quality, and access to natural resources.

What is the Neolithic Revolution?

The Neolithic Revolution was the shift from mobile hunter-gatherer societies to agricultural communities about 12,000 years ago.

What was the Green Revolution?

The Green Revolution involved the use of technology and efficient agricultural practices to increase food production in the 1950s and 60s.

What impact did the Industrial Revolution have on population growth?

The Industrial Revolution led to increased world population growth rates, with a 57% increase at the start and 100% over the next century.

What are urbanised areas known for in terms of population?

Urbanised areas are the most densely populated regions, with about 55% of the population currently living in urban areas.

How did HICs and LICs differ in terms of population growth rates until mid-1900s?

HICs experienced rapid growth due to social and economic changes, while LICs had higher growth rates in contemporary times due to catching up.

What is food security?

Food security means having available, accessible, and affordable food that is safe and nutritious.

What does the Demographic Transition Model (DTM) illustrate?

The DTM illustrates how birth and death rates change over time in relation to population growth.

What does the term 'natural population change' refer to?

Natural population change is influenced by factors such as birth rates, death rates, and migration.

What are push and pull factors in migration?

Push factors drive people away from a location, while pull factors attract people to a new location.

What causes overpopulation?

Overpopulation occurs when there are too many people compared to the available resources in an environment.

What is an ecological footprint?

The ecological footprint measures how much of the Earth’s resources are used compared to what is available.

What are vector-borne diseases?

Vector-borne diseases are illnesses caused by pathogens transmitted by carriers, such as mosquitoes.

What is salinisation?

Salinisation is the increase of salt content in soil, which can negatively impact agriculture.

What role do NGOs play in global health?

NGOs work independently from governments to provide healthcare and promote health, especially in crisis situations.

How does climate change affect agricultural productivity?

Climate change alters precipitation and temperatures, leading to varying impacts on agricultural yields.

What is the consequence of climate change on global food prices?

Climate change can lead to lower agricultural yields, causing food prices to significantly increase.