Building ESG

The fight against climate change requires a two-pronged approach: reducing emissions and removing existing carbon dioxide from the atmosphere. There are a variety of carbon dioxide removal (CDR) techniques available, each with its own advantages and disadvantages. Here’s a quick rundown of a few options:

1. Nature Based Solutions

• Afforestation and reforestation: Planting trees is a well-established and relatively inexpensive way to capture carbon dioxide.
• Soil carbon sequestration: This approach focuses on agricultural practices that increase the amount of carbon stored in soil.
• Biochar: This process involves converting organic material into a charcoal-like substance that can be stored in soil.
• Peatland and coastal wetland restoration: Restoring degraded peatlands and coastal wetlands can increase their ability to store carbon.
• Blue carbon management: Protecting and restoring coastal ecosystems like mangroves and seagrasses that store carbon in their biomass and sediments.

2. Technological Solutions:

• Direct air capture (DAC): This technology captures carbon dioxide directly from the atmosphere. The captured CO2 can then be stored underground or used to create products.
• Bioenergy with carbon capture and storage (BECCS): This technology captures carbon emissions from biomass power plants and stores them underground.
• Enhanced weathering: Spreading crushed rocks on land to absorb CO2 from the air or exposing them to carbon dioxide-rich fluids.

3. Ocean Based Solutions:

• Ocean alkalinity enhancement: Adding chemicals to the ocean to increase its ability to absorb CO2.
• Ocean fertilization: Adding nutrients to the ocean to stimulate the growth of phytoplankton, which absorb CO2 as they grow.

As you can see, the most cost-effective CDR techniques are currently nature-based solutions like afforestation and soil carbon sequestration. However, these methods also have limitations in terms of scalability. Other options, like DAC, may become more cost-competitive in the future but are not there yet.

source :

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