Air Pollution:

• Smoke and harmful gases

• Littering and dumping illegally on the ground

• Water, soil, minerals, wildlife, forests, etc.

• Where something exists or lives

Water Pollution:

• Chemicals being released into oceans, lakes, rivers, etc.

• Protecting things in nature

• Sprays that kill bugs

• Prevent leakage in landfills

Do we need greenhouse gases on Earth?

• Yes - they keep the Earth warm
• Yes - they keep all the gases on our planet
• No - they only cause terrible climate change
• No - they only block some of the Sun's rays

Which of the following are greenhouse gases?

• Carbon dioxide
• Methane
• Nitrous Oxide
• All answers are correct

Which of the following is the most troubling greenhouse gas being produced by humans?

• Water Vapor
• Carbon Dioxide
• Methane
• Nitrous Oxide

VOCAB: The average number of children a female member of a population has during her lifetime

• total fertility rate

• replacement fertility rate

• growth rate

• death rate

According to the population pyramid of this country, its population is most likely...

• growing slowly.
• growing rapidly.
• decreasing.
• not changing.

In recent years, the human population has 

• increased exponentially
• decreased exponentially
• decreased slowly
• increased slowy

Countries with high growth rates usually have an age structure that has

• an even distribution over all ages
• more older people than young people
• more younger people than older people.
• more middle-aged people than younger people.

Which of the following leads to a decrease in birthrates among women?

• Higher Education

• High Infant Mortality Rate

• No Prenatal Care

• No contraceptives