#environment

• Abiology — A theoretical field or branch of study that deals with the research of structures, phenomena, and factors in nature that do not exhibit life or biological characteristics, analyzing the interaction between the inanimate (inorganic) environment and the living one.
• Abiotic — A quality designating an environment, factor, or process characterized by the absence of life or living organisms. In ecology, it refers to the inanimate physical and chemical components of an ecosystem, such as light, temperature, water, soil, and air, which condition the existence of the biocenosis.
• Abiosis — A scientific term denoting the total absence of life or the state of an environment in which the existence of living organisms is completely impossible due to the lack of essential abiotic factors or the presence of extreme physico-chemical conditions. It can also describe the temporary suspension of an organism's vital manifestations (latent life state).
• Activism — A doctrine, attitude, or social and political behavior characterized by dynamic, direct, and militant involvement in public life, aiming to produce structural changes, reforms, or to defend specific rights, humanitarian, or ecological causes. In philosophy, it represents a theory that places human action and will above theoretical contemplation.
• Air — The invisible, odorless, and tasteless gaseous mixture that makes up the Earth's atmosphere, structurally composed mainly of nitrogen (about 78%) and oxygen (about 21%), along with small amounts of argon, carbon dioxide, and other gases. Figuratively, the term describes an appearance, demeanor, a specific atmosphere of a place, or a gentle breeze of wind.
• Aerobiology — An interdisciplinary branch of biology that deals with the study of living organisms and particles of biological origin (such as bacteria, fungi, pollen, spores, cysts, and viruses) passively transported through the air, as well as with the analysis of their movement, survival, and impact on the environment and human health.
• Air filter — A technical device or industrial installation designed to retain impurities, dust, pollen, or other suspended particles in the air, ensuring the purification of the gas stream before it enters a room or an internal combustion engine. In ecology, the term also applies to biological systems for natural atmospheric filtration.
• Aerophytobionts — A scientific term used to designate the assembly of plant organisms (microscopic algae, lichens, mosses) that live and carry out their life cycle exclusively in the aerial environment, on the terrestrial surface, on tree bark, or on other substrates directly exposed to the atmosphere, without structural connection to aquatic or subterranean environments.
• Aeropalynology — A branch of palynology that studies spores, pollen grains, and other microparticles of plant or fungal origin suspended in Earth's atmosphere and transported by air currents. This discipline has major importance in establishing pollen calendars, monitoring air quality, and diagnosing respiratory allergies or seasonal rhinitis.
• Aeroscope — A laboratory apparatus or technical device used for the capture, filtration, and microscopic analysis of microorganisms, dust, spores, pollen, or impurities suspended within a determined volume of atmospheric air. This structural instrument is essential in public hygiene studies, ecological microbiology, and in monitoring air purity within sterile medical rooms.
• Aeroscopy — A scientific method, technique, or laboratory investigation consisting of the examination, observation, and analysis of the physical, biological properties, or impurities of atmospheric air through optical devices. This structural discipline enables the identification of microparticles, bacteria, and pollutant compounds suspended in the lower layers of the troposphere, providing essential data for applied meteorology and public hygiene.
• Aerosol — A heterogeneous macromolecular disperse system formed by a collection of fine particles, solid or liquid, stably suspended within a gaseous medium (such as atmospheric air). In a medical or industrial sense, the term designates either natural phenomena like fog and smoke, or pharmaceutical preparations sprayed under pressure for therapeutic inhalation directly into the airways.
• Aeration tank — A large basin, reservoir, or industrial technical installation used in wastewater treatment plants for their aerobic biological treatment. Its structural operation relies on the continuous and forced insufflation of air (oxygenation) into the liquid mass, a process that stimulates the growth of microorganisms in the active sludge which decompose polluting organic substances.
• Aeroterrestrial — Belonging or relating simultaneously to the air and the earth, or performing its specific activity or phenomena within both the aerial and terrestrial environments. In biology, it describes a complex biotope or species relying on soil for shelter and the atmosphere for respiration or movement. In logistics, it applies to mixed transport systems combining air and road routes.
• Aerotropism — A specific form of tropism or oriented growth movement of plant vegetative organs, such as roots or mycelial filaments, determined by the presence of air or the variation of oxygen concentration in the surrounding environment. This structural phenomenon allows plants to guide their roots toward well-aerated soil layers or to develop respiratory structures above water.
• Agroecology — A scientific discipline that studies ecological processes applied to agricultural production systems, integrating principles from ecology, agronomy, and social sciences. This field promotes the sustainable management of agroecosystems by optimizing interactions between plants, animals, humans, and the environment, offering viable alternatives to intensive industrial agriculture.
• Alkalinity — The property of being alkaline; the total concentration of basic substances in a solution capable of neutralizing hydrogen ions. In hydrology and ecology, it represents the buffering capacity of water against acidification, primarily determined by the presence of carbonate, bicarbonate, and hydroxide ions.
• Aldrin — A surname of Germanic or Anglo-Saxon origin, famous due to the American astronaut Buzz Aldrin (b. 1930), the second man to walk on the Moon during the Apollo 11 mission. In the chemical industry and ecotoxicology, the lowercase term (aldrin) designates a highly toxic organochlorine insecticide, banned globally under the Stockholm Convention due to its heavy structural persistence in the environment.
• Ruderal plants — A specialized term used in botany and ecology to designate ruderal plants, weeds, or pioneer vegetal species that grow on degraded lands, roadsides, debris, or anthropized soils deeply modified by human activity. These organisms exhibit outstanding resilience and the ability to rapidly colonize unstable habitats.
• Allobiosis — A physiological state or form of existence of a living organism characterized by adaptation or reaction to an artificially modified, unnatural environment or one completely different from its native one. In experimental ecology, the term describes the structural response of tissues or cellular communities when forced to survive under non-standard biochemical parameters, demonstrating the metabolic plasticity of the system.