What is the most common type of building material used in the world?

The most common type of building material used in the world is concrete. Concrete is a composite material made from cement, water, and aggregates such as sand, gravel, or crushed stone. It is widely used in construction due to its durability, strength, and affordability.

Concrete has been used in construction for thousands of years, with evidence of its use dating back to ancient Rome and Greece. Today, it is the most widely used building material in the world, with billions of tons produced each year.

Other common building materials include brick, stone, and wood, which have been used for centuries and continue to be used today. However, these materials are often more expensive than concrete and may not be as readily available in all parts of the world.

Overall, the widespread use of concrete in construction reflects its versatility and durability, making it an ideal choice for a wide range of building projects.