Carbon Footprint and Atmospheric Pollutants

Carbon Footprint and Atmospheric Pollutants

Multiple Choice

which gas makes up 21% of the earth's atmosphere?

• carbon dioxde

• methane

• oxygen

• water vapour

Multiple Select

which of these reduced Carbon dioxide in the atmosphere?

• respiration of early life

• photosynthesis of early algae

• formation of sedimentary rocks

• water vapour cooling down

• rising temperature of the surface

Multiple Select

which of these causes an increase in greenhouse gases?

• deforestation

• renewable energy production

• burning fossil fuels

• warming temperature

• rice fields

Multiple Choice

what does combustion mean?

• adding water

• adding hydrogen

• reacting with oxygen

• removing oxygen