19 terms

Human interventions in the carbon cycle

STUDY
PLAY
Mitigation
Efforts/strategies to reduce or prevent negative effects, i.e. greenhouse gas emissions and climate change.
Carbon capture and sequestration
technology used to extract carbon produced from fossil fuels and industrial processes and stored to prevent it entering the atmosphere
Carbon capture traps
up to 90% of CO2 emissions from power plants.
CO2 from carbon capture is transported
in liquid form annually for commercial purposes by road tanker, ship, and pipelines.
CO2 from carbon capture is stored
underground in depleted oil fields, deep saline aquifer formations several kilometres below the surface, or in deep ocean
Issues of storage of carbon
ocean acidification, very costly, requires lots of energy to do
Case Study of Carbon Capture
Boundary Dam, Saskatchewan - coal fired power station complex
How much does Boundary Dam capture
90% of its CO2 output (approximately 1 million tonnes per year)
CO2 injection at Boundary dam
began in 2015
Grasslands
offer a global greenhouse gas mitigation potential of 810 million tonnes of CO2 (in the period up to 2030), almost all of which would be sequestered into the soil.
Forested lands and tree crops
forests are able to reduce CO2 emissions to the atmosphere by storing large stocks of carbon above and below ground, through its absorption by photosynthesis.
Reforesting
increasing tree density in degraded land and forests to increase biomass and therefore carbon density in the biosphere.
38GtC
The potential contribution of afforestation and reforestation activities to global carbon sequestration from 1995-2050
How much carbon was produced by the global aviation industry in 2013
705 million tonnes of CO2 with 3 billion passengers
Paris Protocol
Aims to limit climate change to well below 2 degrees celcius increase, plus compensate poor countries
2015
Date of Paris Protocol
Kyoto agreement
delegates of 159 countries agreed in 1997 to cut greenhouse gas emissions blamed for global warming
Earth summit
in 1992, also known as United Nations Conference on Environment and Development looked at alternative sources of energy to replace the use of fossil fuels which delegates linked to global climate change
Biologic Sequestration
the use of plants to capture CO2 and store it in their stems, roots and in the soil
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