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| Terms for subject Environment (6786 entries) |
| photochemical pollution (Air pollution containing ozone and other reactive chemical compounds formed by the action of sunlight on nitrogen oxides and hydrocarbons, especially those in automobile exhaust) | fotoķīmiskais piesārņojums | |
| photochemical product (Degradation products that are produced by the action of light radiation) | fotoķīmisks produkts | |
| photochemical reaction (Chemical reaction which is initiated by light of a specific wavelength. In an environmental context an example is the potential action of ultraviolet light on CFCs which may bring about the detrimental degradation of the ozone layer. Photochemical reactions initiate the process of photosynthesis in which plants convert carbon dioxide into sugars, which are incorporated into cell materials) | fotoķīmiska reakcija | |
| photochemical smog (A combination of fog and chemicals that come from automobile and factory emissions and is acted upon by the action of the sun. Nitrogen dioxide, in the presence of the sun and some hydrocarbons, is turned into nitric oxide and atomic oxygen. The atomic oxygen reacts with the oxygen molecules and other constituents of automobile exhaust fumes to form a variety of products including ozone. The ozone is harmful in itself and is also implicated in a highly complex series of continuing reactions. As long as there is ozone or nitrogen dioxide and sunlight present, other undesirable reactions will occur) | fotoķīmiskais smogs | |
| photodegradation (The capability of being decomposed by prolonged exposure to light) | foto noārdīšanās | |
| photogrammetry (The process of making measurements from photographs, used especially in the construction of maps from aerial photographs and also in military intelligence, medical and industrial research, etc.) | fotogrammetrija | |
| photograph (An image captured by a camera or some other device and reproduced as a picture, usually on a sensitized surface and formed by the chemical action of light or of radiant energy) | fotogrāfs | |
| photography (The process of forming visible images directly or indirectly by the action of light or other forms of radiation on sensitive surfaces) | fotogrāfija | |
| photosynthesis (The process by which plants transform carbon dioxide and water into carbohydrates and other compounds, using energy from the sun captured by chlorophyll in the plant. Oxygen is a by-product of the process. Photosynthesis is the essence of all plant life (autotrophic production) and hence of all animal life (heterotrophic production) on the planet Earth. The rate of photosynthesis depends on climate, intensity and duration of sunlight, available leaf area, soil nutrient availability, temperature, carbon dioxide concentration, and soil moisture regimes) | fotosintēze | |
| photovoltaic energy | fotoelementu enerģija | |
| photovoltaic solar energy | fotoelementu enerģija | |
| physical alteration (Any change in a body or substance that does not involve an alteration in its chemical composition) | fizikālās izmaiņas | |
| physical chemistry (A science dealing with the effects of physical phenomena on chemical properties) | fizikālā ķīmija | |
| physical conditions | fizikālie apstākļi | |
| physical environment (The material surroundings of a system, process or organism) | fiziskā vide | |
| physical geography (The study of the spatial and temporal characteristics and relationships of all phenomena within the Earth's physical environment) | fizikālā ģeogrāfija | |
| physical measurement of pollution (The quantitative determination of the presence, extent or type of pollutant substances in the environment using mechanical means, including optical, electrical, acoustical and thermodynamic techniques) | piesārņojuma līmeņa fizikālie mērījumi | |
| physical oceanography (The study of the physical aspects of the ocean, the movements of the sea, and the variability of these factors in relationship to the atmosphere and the ocean bottom) | fizikālā okeanogrāfija | |
| physical planning (A form of urban land use planning which attempts to achieve an optimal spatial coordination of different human activities for the enhancement of the quality of life) | fizikālā plānošana | |
| physical pollutant (A pollutant characterized by its influence on environmental conditions caused by forces and operations of physics, such as noise, microwave radiation, vibration, etc.) | fizikālais piesārņotājs |