The material that could change the world... for a third time | TED-Ed

Concrete has been pivotal in building civilizations and shaping skylines, but it also significantly contributes to global warming due to its carbon emissions, primarily from cement production. Innovations are underway to reduce these emissions, including carbon capture and alternative materials, inspired by ancient Roman techniques.

What is the primary material used in modern construction that has shaped urban landscapes?

• Concrete

• Glass

• Steel

• Wood

Which sector is responsible for the highest percentage of greenhouse gas emissions?

• Transportation

• Agriculture

• Electricity

• Concrete production

What is the main challenge in reducing emissions from concrete production?

• Limited demand for concrete

• Lack of alternative materials

• High cost of raw materials

• Emissions from cement production

What is the essential ingredient in cement that contributes to carbon emissions?

• Iron oxide

• Aluminum oxide

• Silica

• Calcium oxide

Which method is suggested to capture carbon emissions during cement production?

• Switching to wood-based materials

• Reducing cement usage

• Carbon capture technology

• Using renewable energy

What ancient material did Romans use to make their concrete more durable?

• Limestone

• Sandstone

• Volcanic ash

• Clay

What is one innovative approach to making concrete more sustainable?

• Reducing water usage

• Storing CO2 in concrete

• Increasing cement content

• Using fossil fuels