The saw teeth are an old product, simple good and without any unnecessary materials.
Natural ventilation combined with a watertight coverage gives a grower a start without great investment.
Your crop will find the environment to grow and will deliver a good quality.
We see the saw tooth formally in African countries but also provides for Europe / Australia the opportunities to build an affordable greenhouse in every area. This with good ventilation but still a protected crop.
Just decent for a good price and are often the first step in the market for a grower.
Even for farmers it is a way to set their cows out of the direct sunlight and out of the rain.