CO2 Removal Geoengineering - Enhanced Weathering

Question 1

Define

Answer 1

Silicate and carbonate minerals dissolving in rainwater.

• > Absorbing CO2 as they form bicarbonate ions.
• > Ends up in the ocean and become stable.
• > Storing a higher amount of CO2 than they release.

Question 2

Weathering is currently responsible for storing how much CO2?

Answer 2

Storing 0.3% of CO2.

Question 3

Scale

Answer 3

LARGE

Question 4

Terrestrial Enhanced Weathering?

Answer 4

Dispersing silicate minerals on land, likely in areas of crop production, in high amounts.

• > Speeds up the reaction.
• > Results in high levels of CO2 absorption.
• > Acting as a fertilizer and increasing crop production.

Question 5

Oceanic Enhanced Weathering

direct approach

Answer 5

Placing the silicate minerals along coastlines or within the ocean to increase the amount of carbon absorbed.
Side-effect: decreasing ocean acidity