what is new is the urgent need to scale up this technology to accommodate another 3 billion people The concept of indoor farming is not new, since hothouse production of tomatoes and other produce has been in vogue for some time. [What is new is the urgent need to scale up this technology to accommodate another three billion people.] how to split the grammar structure of the sentence in bracket? what is the subject? what is new is the urgent need how to understand? thanks！