However, dispersal from these taller stacks causes pollutants to be carried farther, causing widespread ecological damage.

However the degradation products of some pollutants are themselves polluting such as the products DDE and DDD produced from degradation of DDT.

However, globally human-made pollutants from combustion, construction, mining, agriculture and warfare are increasingly significant in the air pollution equation.

However, concentrations of air pollutants near highways may be higher due to increased traffic volumes.

However, an invasion of exotic species, human impact from tourist, deforestation, and the release of pollutants, a many species are under threat.

However, despite these controls, thousands of water bodies in the U. S. remain classified as " impaired ," meaning that they contain pollutants at levels higher than is considered safe by EPA for the intended beneficial use of the water.

However, the term xenobiotics is very often used in the context of pollutants such as dioxins and polychlorinated biphenyls and their effect on the biota, because xenobiotics are understood as substances foreign to an entire biological system, i. e. artificial substances, which did not exist in nature before their synthesis by humans.

However, outdoor wood boilers emit more wood smoke and associated pollutants than other wood-burning appliances.

However, the ceramic industry has been a boon and bain for the town, providing it with much needed employment and chimneys giving out pollutants as most of them still run on coal.

However, because the airport is at the top of the island the accident highlighted the vulnerability of the water supply to airport effluence and other water pollutants.

However as liquid is charged rather than air / gas they absorb the pollutants in the air.

However, there is little evidence that the relationship holds true for other pollutants, for natural resource use or for biodiversity conservation.

However, E85 can further reduce emissions of certain pollutants as compared to conventional gasoline or lower-volume ethanol blends.

However, on date, there are no fish in the river, owing to highly toxic pollutants found in the river water.

However, at eighty-five, he had still been busy writing articles, reviewing and speaking, and I had never before known an Englishman who had visited and lectured in three quarters of the United States.

However, there are still several types of calls that necessitate the use of telephone operators.

However, i ' thar is also still an Islamic ideal to which all Muslims should strive to adhere at all times.

However, many of the causes of amphibian declines are still poorly understood, and are a topic of ongoing discussion.

However, to make a working computer, users still had to add a case, power supply transformers, power switch, ASCII keyboard, and composite video display.

However, a percentage of the indigenous Assyrian population ( known as Ashuriyun by the Arabs ) resisted this process, Assyrian Aramaic language and Church of the East Christianity were still dominant in the north, as late as the 11th and 12th centuries AD.

However, Eastern Aramaic dialects, as well as Akkadian and Mesopotamian Aramaic personal and family names, still survive to this day among Assyrians in the regions of northern Iraq, southeast Turkey, northwest Iran and northeast Syria that constituted old Assyria.

However, tricyclic antidepressants are still used because of their effectiveness, especially in severe cases of major depression.

However 1. 4 billion people still live without clean drinking water and 2. 6 billion of the world ’ s population lack access to proper sanitation.

However, regular church services still take place.

However, there are still buses to Manchester every thirty minutes as well as more frequent services to other towns in east Lancashire.

However, there was still £ 13, 000 to pay on a mortgage, a fairly large amount of money in the 1880s, and Henry was at the time still only a mere parish priest.

However, the Conservatives were still a minority in the House of Commons, and the passage of the Reform Bill required the calling of new election once the new voting register had been compiled.

However, its influence is still felt because a stripped down and syntactically changed version of BCPL, called B, was the language on which the C programming language was based.

However, other usages still occur.

However, attention is still given to these groups by botanists, and fungi ( including lichens ), and photosynthetic protists are usually covered in introductory botany courses.

However, some virus samples are still available in Russian and American laboratories.

However, subsequent models removed this and the " Graphics Synthesizer " GPU, thus removing support for PS2 titles, but still able to play most original PS games.

However, as the market for large systems shifted from proprietary architectures to common servers, the company eventually dropped the V-Series line, although V-series systems were still in use by customers as of 2010.

However, Boxing Day is still celebrated the day following Christmas Day for many British people.

However, at the end of 2009, the Blissymbolic script is still not encoded in the UCS.

However, in instances an individual director may still bind the company by his acts by virtue of his ostensible authority ( see also: the rule in Turquand's Case ).

However, Switzerland did not join the EU customs regime and customs checks are still conducted at or near the crossings.

However, the length and weight of pieces was still set with some Baroque characteristics: individual movements still focused on one affect or had only one sharply contrasting middle section, and their length was not significantly greater than Baroque movements.

However, it is more correct for a very slender plate when the angle becomes large and flow separation occurs, or if the flow speed is supersonic.

However, in a supersonic flow, the pressure disturbance cannot propagate upstream.

However, the arms are the result of an 18th-century restoration, as the original had the arms cut off in order to allow water to flow out.

However, some have suggested that CSF flow along the cranial nerves and spinal nerve roots allow it into the lymphatic channels ; this flow may play a substantial role in CSF reabsorbtion, in particular in the neonate, in which arachnoid granulations are sparsely distributed.

However, it is known that cortisone impairs memory function by reducing the blood flow in the right parahippocampal gyrus, left visual cortex, and the Cerebellum.

However, since three years have passed between the purchase and the sale, any cash flow from the sale must be discounted accordingly.

However, depending on the conditions, an electric current can consist of a flow of charged particles in either direction, or even in both directions at once.

However, this assumption is incorrect ; once solidified, glass does not flow anymore.

However, rather than locating an event or state in time, the way tense does, aspect describes " the internal temporal constituency of a situation ", or in other words, aspect is a way " of conceiving the flow of the process itself ".

However reservoirs have significant environmental impact, as does alteration of naturally occurring stream flow.

However if the region of air breakdown extends to another conductor at a different voltage it will create a conductive path between them, and a large current will flow through the air, creating an " electric arc ".

However, the upper surface in this flow is a complicated, vortex-laden mixing layer, while on the lower surface the flow is quiescent.

However, nasals are also obstruents in their articulation because the flow of air through the mouth is blocked.

However, crackdowns by the governments of Brazil and Argentina have stemmed the flow of shoppers travelling to Paraguay looking for trafficable items.

However due to a slight increase in internal leakage as the pressure increases, a truly constant flow rate cannot be achieved.

However in general the Ricci flow equations lead to singularities of the metric after a finite time.

However, since rheology is concerned with fluids which do not have a fixed viscosity, but one which can vary with flow and time, calculation of the Reynolds number can be complicated.

However, not all polyploids are reproductively isolated from their parental plants, and gene flow may still occur for example through triploid hybrid x diploid matings that produce tetraploids, or matings between meiotically unreduced gametes from diploids and gametes from tetraploids ( see also hybrid speciation ).

However, in this case the plasma would see no force along the long axis, and would rapidly flow out the ends of the solenoid and escape.

However, C language programming is much easier to obtain skilled people in, so most if not all new development is done in C. Since z / TPF allows assembler programs to be repackaged into 1 logical file, critical legacy applications can be maintained and actually improve efficiency-the cost of entering one of these programs will now come at the initial enter when the entire program is fetched into core and logical flow through the program is accomplished via simple branch instructions, instead of a dozen or so IBM instructions previously needed to perform what is known as ' core resident enter / back '.

However, contrary to other designs, large steam volumes are handled with difficulty and only a combination with axial flow turbines ( DUREX ) admits the turbine to be built for power greater than ca 50 MW.

However, electrons cannot flow in the reverse direction because the plate is not heated and does not emit electrons.