All terms

Carbon Dioxide Removal (CDR)

A broad term for methods that remove CO₂ from the atmosphere.

What is Carbon Dioxide Removal (CDR)?

Carbon Dioxide Removal (CDR) is a comprehensive term that refers to a variety of processes and technologies designed to actively remove carbon dioxide from the atmosphere and store it durably. It encompasses both natural and technological solutions, and is distinct from emissions reduction efforts, which aim to prevent new CO₂ from being released.

Why is Carbon Dioxide Removal (CDR) important?

CDR is crucial for mitigating climate change, especially in achieving net-zero emissions targets. While emissions reductions are primary, CDR is necessary to address historical emissions, neutralize hard-to-abate emissions from sectors like agriculture and heavy industry, and potentially reverse warming trends. The IPCC highlights CDR's role in limiting global warming to 1.5°C or 2°C.

Related terms

Want to explore this topic further? Browse connected glossary terms below.

Carbon removal

Carbon removal refers to processes that actively take carbon dioxide out of the atmosphere and store it for the long term.

Core definitions
Negative Emissions

Removing more greenhouse gases from the atmosphere than are emitted.

Core definitions
Carbon Sequestration

The process of capturing and storing atmospheric carbon dioxide.

Core definitions

Frequently asked questions

How does CDR differ from carbon capture?

CDR specifically removes CO₂ from the atmosphere, while carbon capture (CCS/CCU) typically captures CO₂ from point sources (e.g, power plants) before it enters the atmosphere.

Are natural methods of CDR as effective as technological ones?

Both natural (e.g., reforestation, soil carbon sequestration) and technological (e.g., DAC, BECCS) methods of CDR play vital roles. Their effectiveness depends on factors like scalability, permanence, and co-benefits. A portfolio approach combining both types is generally recommended.

What are some common examples of CDR methods?

Common methods include reforestation, afforestation, direct air capture (DAC), bioenergy with carbon capture and storage (BECCS), enhanced weathering, and ocean alkalinity enhancement.