Early Atmosphere
This gas was not present in Earth's atmosphere for the planet's first 2 billion years
Oxygen
Most abundant gas
Nitrogen 78%
The city Zac and Darin traveled to
London
Layer in the stratosphere that absorbs solar radiation and greenhouse gases
Ozone Layer
The current condition of the atmosphere
These "mountains of fire" littered the planet after it was struck by several asteroids
Volcanoes
Lowest layer to the surface where mountains, weather, and people are found
Troposphere
The major greenhouse gas responsible for smog in London in the 1800s-1900s
Ozone
A source of this pollutant is the combustion of coal for energy
Sulfur Oxide
The average weather conditions of an area over a long period of time (30 years)
The microscopic organism that was the first photosynthesizer to produce oxygen
Cyanobacteria
Temperature increases in this layer because it is closest to the Sun
Thermosphere
Placed on roofs to reduce rising surface temperatures
Green roofs/walls
A source of this pollutant is the combustion of gas/oil in vehicles
Nitrogen Oxide
Amount of moisture in the air compared to how much the air can hold (at that temperature)
Relative Humidity
The greenhouse gas spewed out due to an increased amount of volcanic activity
Carbon Dioxide
Troposphere
The current pollutant that London is trying to reduce
PM 2.5
This type of solar radiation is absorbed by the ozone layer, contributing to the greenhouse effect
UV radiation
The average atmospheric pressure at Earth's surface
1013.25 mb
The two main gases present in Earth's early atmosphere
What are hydrogen and helium?
The Thermosphere's alternate identity
Ionosphere
Londoners were charged every time they drove into the city in order to reduce these 2 gases
CO2 and/or O3
Areas more likely to experience secondary pollutants like carbonic acid
Urban
Sinking air at this pressure system leads to clear/fair weather
High Pressure