The distinctive natural appearance of the cactus is a result of adaption to conserve water in dry and/or hot environments. They are firm, have colore and content - my cacti, in contrast, are fragile, transparent and empty.
The glass plants are deliberately broken like cracking pieces of ice.
They planted in concreet-dead substans in which nothing is growing, at the same time it is the greatest building material of 20th century. Dead and fruitile at the same time.