A crucial step in the evolution of modern plant agriculture was the development of low-cost, energy-efficient greenhouse structures that provide optimum growing conditions year-round. In 1964, Professor William J. Roberts developed the first air-inflated double-layer polyethylene greenhouse covering system at Cook College, Rutgers University.
Structures
![Air-Inflated, Double-Layer Polyethylene Greenhouse](/sites/default/files/styles/landmark_node_/public/2018-04/287601086_852074fbff_b.jpg?itok=UrANy_Lz)
![City Plan of Philadelphia](/sites/default/files/styles/landmark_node_/public/City_Plan_of_Philadelphia.jpg?itok=U3XqPDvs)
The City Plan of Philadelphia is a seminal creation in American city planning in that it was the first American City Plan to provide open public squares for the free enjoyment of the community and a gridiron street pattern featuring streets of varying widths: wide main streets and narrower side streets. In addition this plan was the first city plan in the United States to provide for long-term urban growth. These features inspired the planners of many cities to adopt the Philadelphia Plan as a model.
Innovations
![City Plan of Philadelphia](/sites/default/files/styles/thumbnail/public/City_Plan_of_Philadelphia.jpg?itok=oHydAFBL)
The City Plan of Philadelphia is a seminal creation in American city planning in that it was the first American City Plan to provide open public squares for the free enjoyment of the community and a gridiron street pattern featuring streets of varying widths: wide main streets and narrower side…
Read More![Air-Inflated, Double-Layer Polyethylene Greenhouse](/sites/default/files/styles/thumbnail/public/2018-04/287601086_852074fbff_b.jpg?itok=Sim9m5fI)
A crucial step in the evolution of modern plant agriculture was the development of low-cost, energy-efficient greenhouse structures that provide optimum growing conditions year-round. In 1964, Professor William J. Roberts developed the first air-inflated double-layer polyethylene…
Read More