Why were so many of South Carolina's trees cut down in the nineteenth century?

the timber became a important resource to industry.

Explanation:

Throughout the 19th century, the revolution industrial occurred leading to trees cut down. This happened because timber became a primary resource for both regional, national building materials, fuel and importations of millions of feet pine boards to other countries, like new Zealand.

mostly for room for future buildings

Explanation:

in the nineteenth century the industrial revolution started to boom this means business got bigger and more workers were needed.