Human sources of CO2 and CH4
The methane cycle
Natural sources of methane
The carbon cycle
100

The biggest producer of methane released into the atmosphere

What is Fossil fuel production?

100

What consumes soil methane (microorganisms that feed on methane)

What is Methanotrophs?

100

What are responsible for approximately 80% of global methane emissions from natural sources

What is Wetlands?

100

What is one example of a "carbon sink" 

examples discussed in class include: What is the ocean?(!); limestone rocks or cliffs, permafrost, whales . . .

200

The process of disposing waste

What is Waste management?

200

What makes more methane that methanotrophs consume

What is methanogens?

200

estimated to be about 11% of the global methane emissions

What is Termites?

200

Carbon that is stored in a form other than Co2 gas

What is sequestered carbon?

300

the practice of raising and managing animals for their products

What is Livestock farming?

300

What creates methane gas

What is microbes?

300

8% of the global methane emissions from natural sources or between 20- 30 Tg yearly

What is Oceans?

300

The amounts of atmospheric gases on earth (change often/ remain constant).

What is remain constant

400

The combustion of organic matter

What is Biomass burning

400

Methane crystals that are formed in cold, oxygen poor undersea sediments

What is clathrates?

400

approximately 5% of the global methane emissions from natural sources

What is methane hydrates?

400

The amount of carbon pollution created by an organization or individual

What is carbon footprint? 

500

involves flooding fields (paddy fields) with water and planting seedlings in the mud

What is rice cultivation? 

500

solid and white ice, similar to water ice

What is methane hydrate?

500

An unknown (but estimated to be extremely large) quantity of methane is sequestered in frozen areas as 

What is permafrost?

500

Carbon plays a crucial role in creating energy from sunlight in this process:

What is photosynthesis?