What is the fine-grained topic of the following text: Mexican cacti have captivated the scientific community due their extraordinary characteristics and benefits.This research established a new way to use this ancestral plant as a substitute for other construction materials that given their industrial and technological processes have -in several cases- skyrocketed their costs, besides of being a constant hazard for the environment. Only return the topic.
Using Mexican cacti as an environmentally-friendly construction material substitute