Question

several us and canadian companies have developed processes that deal with carbon dioxide in a novel way.

• a us company passes the co₂ emissions from a power plant through seawater where the co₂ reacts with calcium in the seawater to form calcium carbonate. the calcium carbonate is then used to make cement.
• a halifax based company has a process that injects co₂ from power plants into concrete blocks in a way that prevents the blocks from releasing the co₂ over time.

both of these processes are examples of i and reducing the causes of climate change by ii.
the statement above is completed correctly by the information in row ____.
select one:

• using less energy; consuming less fossil fuels
• using less energy; reducing carbon emissions
• carbon capture and storage; consuming less fossil fuels
• carbon capture and storage; reducing carbon emissions

Explanation:

1. Both processes capture CO₂ from power plant emissions and store it (in calcium carbonate/cement or concrete blocks), which fits the definition of carbon capture and storage.
2. By capturing and containing CO₂ instead of releasing it into the atmosphere, these processes directly reduce carbon emissions, which are a primary cause of climate change. The other options are incorrect: the processes do not involve using less energy or consuming less fossil fuels.

Answer:

carbon capture and storage; reducing carbon emissions