Efficiency is one of the main selling points of a swamp cooler over something like an air conditioner. A swamp cooler uses about 25% of the electrical energy needed to power an air conditioner of the same size. Plus, they do not require chemicals to run only a steady supply of water, ...
The rest of the foliage and a section of the branch approximately 10–13 cm in length and 1–3.5 cm diameter were sealed in plastic bags and placed in a cooler with ice until further processing. In the laboratory, a 2.5 cm long sample was removed from the center of each branch ...