IB Biology Topic D4.3.1 Anthropogenic Causes of Climate Change Revision Notes (SL/HL)

IB Biology Topic D4.3.1 Anthropogenic Causes of Climate Change Revision Notes (SL/HL) | RevisionDojo

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Climate change today is driven mainly by human activity

Definition

Anthropogenic

Anthropogenic refers to changes in the environment caused by human activities.

Climate change is driven by both natural factors and anthropogenic (human-caused) factors.
Recent warming is dominated by anthropogenic release of greenhouse gases, mainly carbon dioxide (CO₂) and methane (CH₄), which trap heat and intensify the greenhouse effect.

Definition

Greenhouse gas

A greenhouse gas is a gas that contributes to the greenhouse effect by absorbing infrared radiation

Note

The greenhouse effect is a natural process that warms the Earth's surface.
Human activity has intensified this effect, driving present-day climate change.

Human CO₂ mostly comes from burning carbon that was locked away

Burning fossil fuels: coal, oil, and natural gas are the primary anthropogenic source of CO₂.
1. These fuels power energy production, transport, and industry.
2. Combustion releases carbon stored in the fuel into the atmosphere as CO₂.
3. Coal power plants and petrol vehicles are everyday examples of large CO₂ emitters.
Deforestation: clearing forests for agriculture, urban development, or logging is another major CO₂ source.
1. Trees absorb CO₂ during photosynthesis, so removing them releases stored carbon back into the atmosphere.
2. Losing trees also reduces the Earth's future capacity to absorb CO₂.

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(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Note

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Excepteur sint occaecat cupidatat non proident

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Climate change today is driven mainly by human activity

Definition

Anthropogenic

Anthropogenic refers to changes in the environment caused by human activities.

Climate change is driven by both natural factors and anthropogenic (human-caused) factors.
Recent warming is dominated by anthropogenic release of greenhouse gases, mainly carbon dioxide (CO₂) and methane (CH₄), which trap heat and intensify the greenhouse effect.

Definition

Greenhouse gas

A greenhouse gas is a gas that contributes to the greenhouse effect by absorbing infrared radiation

Note

The greenhouse effect is a natural process that warms the Earth's surface.
Human activity has intensified this effect, driving present-day climate change.

Human CO₂ mostly comes from burning carbon that was locked away

Burning fossil fuels: coal, oil, and natural gas are the primary anthropogenic source of CO₂.
1. These fuels power energy production, transport, and industry.
2. Combustion releases carbon stored in the fuel into the atmosphere as CO₂.
3. Coal power plants and petrol vehicles are everyday examples of large CO₂ emitters.
Deforestation: clearing forests for agriculture, urban development, or logging is another major CO₂ source.
1. Trees absorb CO₂ during photosynthesis, so removing them releases stored carbon back into the atmosphere.
2. Losing trees also reduces the Earth's future capacity to absorb CO₂.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D4.3.1: Anthropogenic Causes of Climate Change Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Climate change today is driven mainly by human activity

Human CO₂ mostly comes from burning carbon that was locked away

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Climate change today is driven mainly by human activity

Human CO₂ mostly comes from burning carbon that was locked away

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account