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Water in three states: liquid, solid (ice), and gas (invisible water vapor in the air). Clouds are accumulations of water droplets, condensed from vapor-saturated air. Video demonstrating states of water present in domestic life. Water is a chemical compound with the chemical formula H 2O. A water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds. Water is a liquid at standard ambient temperature and pressure, but it often co-exists on Earth with its solid state, ice, and gaseous state, steam (water vapor). Safe drinking water is essential to humans and other lifeforms even though it provides no calories or organic nutrients. Chemical and physical properties Impact from a water drop causes an upward "rebound" jet surrounded by circular capillary waves. Water is the chemical substance with chemical formula H 2O: one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. The major chemical and physical properties of water are:

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Ice A glacier is made from ice, itself resulting from snow accumulation. Frozen water in the form of an ordinary (household) ice cube. The white zone in the center is due to tiny air bubbles. Water gets smart: 31 million digital meters expected by 2016 With so much buzz surrounding the development of a cleaner and more efficient electrical grid, only a few analysts have questioned the need for similar smart infrastructure for water. But several companies, including IBM, are already leading a wave of innovation aimed at improving measurement and management tools for water. Spotting this swelling interest, Pike Research released a report predicting that there will be 31.8 million smart meters worldwide by 2016, up from the 5.2 million meters already in place in 2009. It also said that 31 percent of all new water meters delivered will be digital, allowing for two-way communication between meters, utilities and even consumers. Like businesses and utilities already jumping into the smart water movement, Pike sees water shortages as a prime motivator for accelerated innovation. With water supplies drying up, utilities are moving fast to encourage conservation and eliminate systemic problems.

Effects of the automobile on societies Urban land use is often dominated by automobiles. Pictured: São Paulo, Brazil. World map of automobiles per 1000 people. Over the course of the 20th century, the automobile rapidly developed from an expensive toy for the rich into the de facto standard for passenger transport in most developed countries.[1] In developing countries, the effects of the automobile have lagged, but are emulating the impacts of developed nations. The development of the automobile built upon the transport revolution started by railways, and like the railways, introduced sweeping changes in employment patterns, social interactions, infrastructure and goods distribution.

ncern over water shortage at Olympic Games - Home News - UK Spectators are not permitted to bring more than 100ml of water into the Olympic Park and other Games venues but are told they can bring in empty bottles and fill them. But today, the Commission for a Sustainable London 2012 has voiced concerns about a shortage of water at the sites. The body, which monitors the sustainability of the Games, said there have been queues at all venues for water. They accused London 2012 organisers of getting caught short and not anticipating the demand.

Sky The sky (or celestial dome) is everything that lies a certain distance[clarification needed] above the surface of the Earth, including the atmosphere and outer space. In the field of astronomy, the sky is also called the celestial sphere. This is an imaginary dome where the sun, stars, planets, and the moon are seen to be traveling. The celestial sphere is conventionally divided into regions called constellations. Usually, the term sky is used from the point of view of the Earth's surface; however, the exact meaning of the term can vary. For example, in some cases the sky is defined as only the denser portions of the atmosphere.

The Water Cure From the book: "Your Body's Many Cries for Water" Cure # 1: Water prevents and cures heartburn. Waste container Litter bin redirects here. For a place for pet animals to 'go to the toilet' in, see litter box. A waste container is a container for temporarily storing waste, and is usually made out of metal or plastic. Common terms are dustbin, rubbish bin, litter bin, garbage can, trash can, trash bin, dumpster, waste basket, waste paper basket, waste receptacle, container bin, bin and kitchen bin. Sadness A detail of the 1672 sculpture Entombment of Christ, showing Mary Magdalene crying. In childhood[edit] Sadness is a common experience in childhood. Acknowledging such emotions can make it easier for families to address more serious emotional problems,[3] although some families may have a (conscious or unconscious) rule that sadness is "not allowed".[4] Robin Skynner has suggested that this may cause problems when "screened-off emotion isn't available to us when we need it... the loss of sadness makes us a bit manic".[5] Sadness is part of the normal process of the child separating from an early symbiosis with the mother and becoming more independent.

Water-energy nexus The water-energy nexus[1] is the relationship between how much water is evaporated to generate and transmit energy, and how much energy it takes to collect, clean, move, store, and dispose of water. Water for Electricity[edit] All types of electricity generation consume water either to process the raw materials used in the facility or fuel, constructing and maintaining the plant, or to just generate the electricity itself. Renewable power sources as photovoltaic solar and wind power, which require little water to produce energy, require water in processing the raw materials to build the turbines and solar panels. If a wind turbine is mounted on a concrete or steel tower, additional tonnes of water are required in the tower's construction.

Oil sludge Oil sludge or black sludge is a solid or gel in motor oil caused by the oil gelling or solidifying, usually at temperatures lower than 100 degrees Celsius. Oil sludge can be a major contributor to internal combustion engine problems, and can require the engine to be replaced, if the damage is severe. Sludge is usually caused by a poorly designed or defective crankcase ventilation system, low engine operating temperatures or the presence of water in the oil, and can accumulate with use. Ways to minimize sludge production and accumulation includes performing frequent oil changes, performing mechanized engine flushing, or de-sludging, using synthetic oil,[1] and following the manufacturer's engine maintenance routine. Toyota, VW, Audi and some Saab engines are known for oil sludge.[citation needed]

Winter Winter (/ˈwɪntər/) is the coldest season of the year in temperate climates, between autumn and spring. It is caused by the axis of the Earth in the respective hemisphere being oriented away from the Sun. Different cultures define different dates as the start of winter, and some use a definition based on weather, but when it is winter in the Northern Hemisphere it is summer in the Southern Hemisphere, and vice versa. Life and Secrets of Water Every system in the body depends on water. [1] Enzyme production, digestion, detoxification, even the beating of your heart are all processes that require water. Water is a solvent for minerals, vitamins, and other nutrients. Water is essential for the elimination of waste.

Environmental impact of aviation The environmental impact of aviation occurs because aircraft engines emit noise, and particulates and gases which contribute to climate change[1][2] and global dimming.[3] Despite emission reductions from automobiles and more fuel-efficient and less polluting turbofan and turboprop engines, the rapid growth of air travel in recent years contributes to an increase in total pollution attributable to aviation. In the European Union, greenhouse gas emissions from aviation increased by 87% between 1990 and 2006.[4] There is an ongoing debate about possible taxation of air travel and the inclusion of aviation in an emissions trading scheme, with a view to ensuring that the total external costs of aviation are taken into account.[5] Climate change[edit]