Building materials are materials that are used in the construction and production of various structures. In the construction of a building, different materials are used, which are natural or artificial, raw or combined, and each of them has unique features. Familiarity with these materials is essential in order to draw and implement construction plans, so construction activists should be well acquainted with building materials and materials to build a durable and durable structure. The most common materials that have been used from the past to the present and still have their place in the architecture and construction industry are wood, cement, metal, brick and concrete. These materials are used in various projects due to their very high resistance and affordable cost. In today's modern world, modern building materials are produced and marketed by artisans, which have countless capabilities and advantages compared to older materials. Each of these materials is used in different parts of the building according to their strength and efficiency. What we will talk about in the rest of this article is the introduction of different types of building materials and their applications. Stay with us.
The art of face and body makeup was first invented by men in history. Neanderthals or early humans were the first people to use red and paint the bones of their dead. They used the same color to decorate their faces and bodies. Maybe makeup was first made by Egyptian women to beautify themselves. In the images obtained, it is clear that the women of this land used red to blush the lips and cheeks and black to darken the eyes. The color black was generally lead, and sometimes manganese and carbon oxides were used. The Egyptians were also the first people to choose green for makeup and used green powder as eye shadow and eyelash or eyebrow coloring. Gradually, by mixing these compounds with copper and iron oxides, new colors such as turquoise, purple, etc. were obtained, and the shades became more colorful. Adding white powder also allowed the Egyptians to make a tonality from black to gray, gray, and white, and by adding fat to it, they changed the concentration of the ingredients, in other words, they prepared the first cosmetics. For example, by combining colors, they obtained a light, creamy cream based on horse milk and alabaster, and used it to color the body. Hair was applied to the hair, hands, and nails, and aromatic oils and fats were used to protect the skin.
Food production has tripled over the past half century and has allowed the world's population to increase by 4.5 billion people. This boom in food supply as a result of the Green Revolution avoided widespread famine but carried with it substantial environmental costs including depletion of freshwater resources, eutrophication from injudicious fertilizer use, greenhouse gas emissions from livestock, rice paddies, mechanization, and fertilizer denitrification, and agricultural expansion into natural systems. Humanity will need to feed several billion more people by mid-century while minimizing the environmental burden of food production and coping with the impacts of a changing climate. This text provides an overview of the key tradeoffs that have historically occurred between food production and the environment and explores solutions that offer promise for enhancing food supply and environmental stewardship together.
لورم ایپسوم متن ساختگی با تولید سادگی نامفهوم از صنعت چاپ و با استفاده از طراحان گرافیک است. چاپگرها