Because some materials have both useful mineral content and recoverable calorific value, the distinction between alternative fuels and raw materials is not always clear.

Because of the high reactivity, samples of solid europium rarely have the shiny appearance of the fresh metal, even when coated with a protective layer of mineral oil.

Because of high costs, the development of petroleum, phosphate, and other mineral resources is not a near-term prospect.

Because obsidian is metastable at the Earth's surface ( over time the glass becomes fine-grained mineral crystals ), no obsidian has been found that is older than Cretaceous age.

Because potassium reacts with water vapor present in the air, it is usually stored under anhydrous mineral oil or kerosene.

Because of the intensive exploitation throughout Taiwan's pre-modern and modern history, the island's mineral resources ( e. g. coal, gold, marble ), as well as wild animal reserves ( e. g. deer ), have been virtually exhausted.

Because it is acidic, it can dissolve mineral deposits from glass, coffee makers, and other smooth surfaces.

Because it is thought to be the most abundant mineral in Earth ’ s mantle at shallower depths, the properties of olivine have a dominant influence upon the rheology of that part of Earth and hence upon the solid flow that drives plate tectonics.

Because the county's mineral resources, with the significant exception of granite, did not exist in commercially exploitable concentrations, the boom period soon faded.

Because the older formations contained many mineral deposits, they were explored very early on by the mining industry.

Because of this, many dermatologists consider mineral makeup to be purer and kinder to the skin than makeup that contains those ingredients.

Because titanium dioxide and zinc oxide have anti-inflammatory properties, mineral makeups with those ingredients can also have a calming effect on the skin, which is particularly important for those who suffer from inflammatory problems such as rosacea.

Because they don't contain liquid ingredients, mineral makeups can last in their containers indefinitely as long as the user doesn't contaminate them with liquid.

Because the terrain was extremely rugged and lacked any major sources of wealth such as mineral riches, the area that is now Montenegro became a haven for residual groups of earlier settlers, including some tribes who had escaped Romanisation.

Because it is noncompressible, mineral oil is used as a hydraulic fluid in hydraulic machinery and vehicles.

Because of its properties that prevent water absorption, combined with its lack of flavor and odor, food grade mineral oil is a popular preservative for wooden cutting boards, salad bowls and utensils.

Because the Nazis saw the Rammelsberg with its metal ores as vital to the war effort and the difficulty of mineral dressing the ore had been technically solved ( using froth flotation ), the mine was greatly expanded as part of the Nazi's Four Year Plan.

Because Librazhd is renowned for the medicinal qualities of its natural mineral water, the maintenance of the water industry makes Librazhd residents particularly proud.

Because skarns are formed from incompatible-element rich, siliceous aqueous fluids a variety of uncommon mineral types are found in the skarn environment, such as: tourmaline, topaz, beryl, corundum, fluorite, apatite, barite, strontianite, tantalite, anglesite, and others.

Because iron is an important mineral in mineralization, ferritin is employed in the shells of organisms such as molluscs to control the concentration and distribution of iron, thus sculpting shell morphology and colouration.

Because of interactions with pigments, artists require a higher grade of mineral spirits than many industrial users, including the complete absence of residual sulfur.

Because of negative publicity and cost factor, the use of the classical rasayana formulas has declined considerably, and most of the preparations available now have herbal ingredients with a couple of mineral and animal products.

Because of the supposed curative powers of the area's mineral springs, it is a frequent destination for people with health problems.

Because the great mineral resources of the region hadn't been fully realized yet, the C & O suffered through the bad times brought on by the Financial Panic of 1873, and went into receivership in 1878.

Because of the alcohol content, it is possible to fail a breathalyzer test after rinsing although breath alcohol levels return to normal after 10 minutes.

Because fly ash addition allows a lower concrete water content, early strength can also be maintained.

Because of the controversial format and content of the show, distributor MCA Television had problems selling the show to a number of stations and advertisers.

Because of its very low alcohol content, non-alcoholic beer may be legally sold to minors in many American states.

Because of the lack of central authority in P2P networks, forces such as the recording industry, RIAA, MPAA, and the government are unable to delete or stop the sharing of content on P2P systems.

Because of the scope and variety of content and the number of system interfaces, intranets of many organizations are much more complex than their respective public websites.

Because ISPs are no longer prohibited from discriminating among different types of content under common carrier law, Internet providers may charge additional fees for certain kinds of services, such as Virtual Private Networks.

Because of its low energy density and typically high moisture content, brown coal is inefficient to transport and is not traded extensively on the world market compared with higher coal grades.

Because the original of the chronicle as well as the earliest known copies are lost, it is difficult to establish the original content of the chronicle.

Because of their high water content, transpiration rates and consequent loss weight, the nuts react as fresh fruits ( not as nuts ).

The recycling code for plastics was introduced in 1988 by plastics industry through the Society of the Plastics Industry, Inc. Because municipal recycling programs traditionally have targeted packaging – primarily bottles and containers – the resin coding system offered a means of identifying the resin content of bottles and containers commonly found in the residential waste stream.

Because of Segovia's predilection for altering the musical content of his editions to reflect his interpretive preferences, many of today's guitarists prefer to examine the original manuscripts, or newer publications based on the original manuscripts in order to compare them with Segovia's published versions, so as to accept or reject Segovia's editorial decisions.

Because silicone allows more oxygen permeability than water, the oxygen permeability of silicone hydrogels is not tied to the water content of the lens.

Because the vas deferens deposits seminal fluid into the prostatic urethra, and secretions from the prostate gland itself are included in semen content, prostate cancer may also cause problems with sexual function and performance, such as difficulty achieving erection or painful ejaculation.

Because Gardner claimed that the intelligences are innate potentialities related to a general content area, MI theory lacks a rationale for the phylogenetic emergence of the intelligences.

Because of Canadian content requirements, the need for Canadian-produced programming led to more preservation of the shows they produced, and even extremely poorly received programs ( such as the infamous The Trouble with Tracy ) were saved and rerun for several years after their cancellation.

Because of the low salt content of the Maya diet, it is estimated that Tikal would have had to import 131 tons of salt each year, based on a conservative population estimate of 45, 000.

Because of his new lifestyle and the content of his books and blogs, he was often regarded as an adherent of the New Age movement, although he rejected such a qualification as being too narrow.

Because of this plug-in extensibility and modular design, Drupal is sometimes described as a content management framework.

Because of the necessary low fat and moisture content, jerky is high in protein.

Because the couple's bank account is in Robert's name, Howard obtains Robert's consent to buy the letter, but he does so deceitfully, lying about and trivializing its content, leaving out the true circumstances, and giving the man no idea that the price is equivalent to almost all the money he has in the bank.

Because the content is electronic, it may be distributed over the Internet and through electronic bookstores.

Because of its low content of tyramine, an organic compound thought to be associated with headaches, it is frequently recommended as one of the few cheeses that is safe to eat for migraine sufferers.

Because of its emotional content, the painting has become an icon of American history.