Without greenhouse gases, how much cooler would the Earth be?
Without greenhouse gases, Earth would be covered in ice with an average temperature 35oC lower than at present.
What is the greenhouse effect?
The greenhouse effect is the process in which the absorption and subsequent emission of infrared radiation by atmospheric gases warms the lower atmosphere and the planet's surface.
Large quantities of methane are trapped in ice-like structures in the sea called what?
Large quantities of methane are trapped in ice-like structures in the sea called clathrates.
The ability of a trace gas to cause global warming is its what?
The ability of a trace gas to cause global warming is its global warming potential (GWP).
What does carbon capture and storage (CSS) do?
Carbon capture and storage (CSS) or sequestration captures carbon dioxide from power stations and stores it away safely instead of releasing it into the atmosphere.
What can act as a sponge to store carbon dioxide gas?
Underground porous rock can act as a sponge to store carbon dioxide gas.
It is extrememly difficult to extract the final how much oil from an oil field?
It is extremely difficult to extract the final 30% of oil from an oil field.
If hydrogen is burnt, what is the only emission?
If hydrogen is burnt, water is the only emission.
CO2 could be stored as carbonates by doing what?
CO2 could be stored as carbonates by reacting it with a metal oxide.
Environmentally, ozone can be good or bad depending on where it's found. How can ozone be bad?
Ozone can be bad because in the troposphere it is an air pollutant with harmful effects on the respiratory system of animals.
Environmentally, ozone can be good or bad depending on where it's found. How can ozone be good?
Ozone can be good because in the stratosphere it protects living organisms by preventing harmful ultraviolet light from reaching the Earth's surface.
What is the lowest layer of the Earth's atmosphere (from Earth's surace up to about 7km above the poles and 20km above the tropics)
The troposphere is the lowest layer of the Earth's atmosphere, extending from the Earth's surface up to about 7km (above the poles) and about 20km (above the tropics).
What is the second layer of the Earth's atmoshere?
The stratosphere is the second layer of the Earth's atmosphere, containing the 'ozone layer' about 10km-50km above the Earth's surface.
Which wavelengths of ultraviolet light does the ozone layer filter out?
The ozone layer filters out the short wavelengths - i.e. those less than 320nm.
Which wavelengths of light does the sun have?
The sun has wavelengths in the range of 270-400nm.
What is ozone concentration measured in?
Ozone conentration is measured in Dobsons in honour of British meteorologist GMB Dobson.
What wavelength does UVA cover?
UVA is 320-400nm.
TRUE or FALSE
UVA radiation reaches the Earth's surface?
UVA reaches the Earth's surface. It has less energy tham shorter wavelengths and is not as damaging. UVA radiation doesn't cause much concern.