amazing recipe for making multiple stone disappear and when the empire collapsed. they are more or less two thousand years tall and for us was very important because from the roman concrete the clonidine we can learn and study what the modern concrete can be. the romans made this top product despite having no killings that could reach temperatures of one thousand five hundred degrees celsius instead they harness the power of the volcano which practically pre roasted the pots of money cash. was created by adding the raw material at the temperature of one thousand so it's just a degree and so using the experience made by the romans we can have some ports around it's meant to do that can have a look for c o two emissions for its. but unfortunately naturally pretty roasted material such as put salon a is red that's why research is