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Hace 4 días · Air pollution is contamination of the indoor or outdoor environment by any chemical, physical or biological agent that modifies the natural characteristics of the atmosphere. Household combustion devices, motor vehicles, industrial facilities and forest fires are common sources of air pollution. Pollutants of major public health concern include ...
Hace 2 días · Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measured with a thermometer.It reflects the average kinetic energy of the vibrating and colliding atoms making up a substance.. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for ...
Hace 2 días · This permitting mechanism is designed to prevent stormwater runoff from washing harmful pollutants into local surface waters. Authorization Status for EPA's Stormwater Construction and Industrial Programs – Most states are authorized to implement the stormwater NPDES permitting program. EPA remains the permitting authority in a few states ...
Hace 4 días · desalination, removal of dissolved salts from seawater and in some cases from the brackish (slightly salty) waters of inland seas, highly mineralized groundwaters (e.g., geothermal brines), and municipal wastewaters. This process renders such otherwise unusable waters fit for human consumption, irrigation, industrial applications, and various ...
Hace 1 día · To be in deep water – To be in trouble or a difficult situation. Money and Business: To make a splash – To attract a lot of attention. Money down the drain – Wasting money on something with no return. Silence and Secrets: Hold water – When an argument or idea is sound or logical. Spill the beans – To reveal a secret.
Hace 1 día · Obesity was traditionally defined as an increase in body weight that was greater than 20 percent of an individual’s ideal body weight—the weight associated with the lowest risk of death, as determined by certain factors, such as age, height, and gender. Based on these factors, overweight could then be defined as a 15–20 percent increase ...
Hace 5 días · hydroelectric power, electricity produced from generators driven by turbines that convert the potential energy of falling or fast-flowing water into mechanical energy. In the early 21st century, hydroelectric power was the most widely utilized form of renewable energy; in 2019 it accounted for more than 18 percent of the world’s total power ...
