Human Population Growth
The increase in the number of humans living in an area over time.
What is population growth?
Materials found in nature that humans use.
What are natural resources?
A mixture of gases that surrounds Earth.
What is the atmosphere?
Water pollution occurs when harmful substances enter this.
What are rivers, lakes, oceans, or water sources?
The variety of different species living in an ecosystem.
What is biodiversity?
The African national park featured in the documentary.
What is Virunga National Park?
A J-shaped growth pattern where population increases rapidly.
What is exponential growth?
Resources that can replenish naturally in a short time.
What are renewable resources?
Air pollution caused by smoke, factories, and vehicle emissions.
What are pollutants?
Excess nutrients entering water causing algae growth.
What is eutrophication?
Large-scale cutting down of forests.
What is deforestation?
The endangered animals that rangers are trying to protect.
What are mountain gorillas?
The maximum population an environment can support long-term. .
What is carrying capacity?
Resources that take millions of years to form.
What are nonrenewable resources?
A type of pollution caused when fossil fuels burn and release gases into the air.
What is greenhouse gas pollution?
A lack of oxygen in water caused by too much algae growth.
What is hypoxia (low oxygen levels)?
When a species disappears forever.
What is extinction?
One major threat to the park highlighted in the film.
What is oil exploration or armed conflict?
Two factors that have helped increase human population in the past 200 years.
What are advances in medicine and agriculture?
An example of a fossil fuel used for energy.
What is coal, oil, or natural gas?
This gas is the most common greenhouse gas produced by human activities.
What is carbon dioxide?
A common source of water pollution from farms.
What is fertilizer or pesticide runoff?
A species introduced into a new environment that causes harm.
What is an invasive species?
The people who risk their lives protecting the park and wildlife.
Who are park rangers?
Population growth can increase pressure on these two environmental things.
What are natural resources and ecosystems?
Using resources in a way that does not harm future generations.
What is sustainability?
Poor air quality can lead to problems with this body system.
What is the respiratory system?
Water that is safe for humans to drink is called this.
What is potable water?
The protection and management of ecosystems and wildlife.
What is conservation?
The main message of the documentary.
What is protecting biodiversity and natural resources is important?