Front

What are zero emissions vehicles?

Back

Vehicles that produce no emissions from tailpipes or gasoline.

Front

What pH level is considered acid precipitation?

Back

Precipitation is considered acid if it has a pH of less than 5.0.

Front

How have lead emissions changed since the early 1980s?

Back

Lead emissions have decreased due to the use of lead-free gasoline.

Front

What are industrial smokestacks?

Back

Structures that release pollutants into the atmosphere, contributing to air pollution and climate change.

Front

Which gas is most abundant in the Earth's atmosphere?

Back

Nitrogen is the gas that exists in the highest concentration in the Earth's atmosphere.

Front

What is the primary cause of acid rain?

Back

Acid rain is primarily caused by sulfur dioxide and nitrogen oxides released into the atmosphere.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the warming of the Earth's surface due to trapped heat from greenhouse gases.

Front

What are the main sources of air pollution?

Back

Main sources include vehicle emissions, industrial discharges, and burning fossil fuels.

Front

What is smog?

Back

Smog is a type of air pollution that combines smoke and fog, often seen in urban areas.

Front

What role do trees play in air quality?

Back

Trees improve air quality by absorbing carbon dioxide and releasing oxygen.