However, they are vulnerable to over-fishing, mining for construction materials, pollution, and damage caused by tourism.

However, posted limits are in place on many dangerous or congested stretches as well as where traffic noise or pollution poses a problem.

However, using the definition of " light pollution " from some Italian regional bills ( i. e., " every irradiance of artificial light outside competence areas and particularly upward the sky ") only full cutoff design prevents light pollution.

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

However, due to widespread pollution during the Industrial Revolution in England, many of the lichens died out, and the trees which peppered moths rested on became blackened by soot, causing most of the light-coloured moths, or typica, to die off due to predation.

However, water pollution has affected the viability of this project.

However, the majority of overall air pollution is produced by cars.

However, a voluntary exchange would not be Pareto superior if external costs ( such as pollution that hurt a third party ) exist, as they often do.

However, diversity and numbers have been reduced by artificial reduction of river flow ( construction of dams ), over-fishing and water-intense large-scale cultivation of cotton, causing increasing levels of pollution.

However, although CO < sub > 2 </ sub > emissions are an externality, using energy services may result in other negative externalities, e. g., air pollution.

However, the citizens of Lynchburg did not want the junction due to the noise and pollution it would create.

However, owing to pollution concerns, it was closed in the 1990s.

However, caution should be observed when collecting seaweed, particularly from areas that are liable to pollution, such as downriver ( including estuaries ) of industrial activities as seaweed is susceptible to contamination.

However, it has been countered that the government who provides the most efficient services, including regulatory structure and welfare spending, will win through competition, and that race-to-the-bottom is not the norm, but applies only to special situations such as extradition and atmospheric pollution.

However, Lights Out is a campaign group who protest against the city's light pollution.

However, in 1983 a bypass was opened, and, freed from the constant traffic and pollution, the village could hold events on the High Street and in the Market Place once again.

However, local campaign groups, including Luton and District Association for the Control of Aircraft Noise ( LADACAN ) and Stop Luton Airport Plan ( SLAP ) opposed the new expansion plans, for reasons including noise pollution and traffic concerns ; LADACAN also claimed that various sites, including Someries Castle, a Scheduled Monument, would be threatened by the expansion.

However, sulfate pulping is more widely used since the product is more durable and the chemicals used in the process can be recovered, thus resulting in minimal environmental pollution.

However, English Heritage's research prior to the restoration suggests that the black coating pre-dates 1914 and may have been a response to atmospheric pollution that had destroyed the original gold leaf surface.

However, habitat destruction, degradation, and pollution on a local scale have resulted mainly from land and watershed urbanization.

However, environmental activists wish this case to serve as a precedent against pollution causing business being carried out by firms in developing countries.

However, Wu Lihong, one of the leading environmentalists who had been publicizing the pollution of the lake, was sentenced to three years in prison for alleged extortion of one of the polluters, but, undeterred, alleged in 2010 that not a single factory was closed.

However, in 2010 The Economist reported that a fresh pollution outbreak had occurred, and that Wu, released from prison in April, was claiming that the government was trying to suppress news of it, all the while switching to other supplies in place of lake water.

However, building height restrictions around the airport raised concerns about flight safety, blocking of radio communications, noise pollution, and a reduced number of flights.

However, if light travels at finite speed, the Earth, and therefore the eye piece of the telescope, moves from E to E ′ during the time it takes light to travel from S to E. Consequently, the star will no longer appear in the center of the eye piece.

However, not all substances or chemical compounds consist of discrete molecules, and indeed most of the solid substances that makes up the solid crust, mantle, and core of the Earth are chemical compounds without molecules.

However, iron is the most abundant element ( by mass ) making up the Earth, and oxygen is the most common element in the Earth's crust.

However, even Walter Alvarez has acknowledged that there were other major changes on Earth even before the impact, such as a drop in sea level and massive volcanic eruptions that produced the Indian Deccan Traps, and these may have contributed to the extinctions.

However, on scales comparable to the radius of the observable universe, we see systematic changes with distance from the Earth.

However, the current consensus in the Earth science community is that this feature is unlikely to be an actual impact crater.

However, there are other forces changing the rotation rate of the Earth.

However, the Dalek force is destroyed by the Doctor, and Davros is captured and imprisoned by the humans in suspended animation, before being taken to Earth to face trial.

However, a defect in the capsule's hatch latching mechanism caused difficulties opening and closing the hatch, which delayed the start of the EVA and put White and his crewmate at risk of not getting back to Earth alive.

However, the scientists of this civilization tried to control the Earth's climate by creating a weather machine, so the Earth created the Black Mothra, named Battra.

However, afterwards, Battra became uncontrollable, and started to harm the very Earth that created it.

However, since the Earth reflects about 30 % of the incoming sunlight, the planet's effective temperature ( the temperature of a blackbody that would emit the same amount of radiation ) is about − 18 ° C, about 33 ° C below the actual surface temperature of about 14 ° C.

However, White Fang refuses to surrender, and sends Libra plunging on a collision course with Earth.

However, the Daleks return in " Bad Wolf "/" The Parting of the Ways " ( 2005 ), and subsequently in " Army of Ghosts "/" Doomsday " ( 2006 ), " Daleks in Manhattan "/" Evolution of the Daleks " ( 2007 ), " The Stolen Earth "/" Journey's End " ( 2008 ) and " Victory of the Daleks " ( 2010 ), the penultimate of these being the series 4 finale where Davros also returns, and the final of these being the first time the Eleventh Doctor meets the Daleks.

However, the current global warming may result in the Earth becoming warmer than the Eemian Stage, which peaked at roughly 125, 000 years ago and was warmer than the Holocene.

However, Theosophists believe that the soul is recalled back to Earth after an average of about 1400 years by the Lords of Karma to incarnate again.

However, either fission or fusion technologies can in principle achieve velocities far higher than needed for Solar System exploration, and fusion energy still awaits practical demonstration on Earth.

However, the game is not a storyline sequel, and instead focuses on an assault on an alien planet, Stroggos, in retaliation for Strogg attacks on Earth.

However, in the Earth – Moon case, the problem of stability is greatly complicated by the appreciable solar gravitational influence.

However, the distinction between mass and weight becomes important for measurements with a precision better than a few percent ( because of slight differences in the strength of the Earth's gravitational field at different places ), and for places far from the surface of the Earth, such as in space or on other planets.

However, the majority of familiar solid substances on Earth, including most of the minerals that make up the crust, mantle, and core of the Earth, contain many chemical bonds, but are not made of identifiable molecules.

However, Bada noted that in current models of early Earth conditions, carbon dioxide and nitrogen ( N < sub > 2 </ sub >) create nitrites, which destroy amino acids as fast as they form.

However, the early Earth may have had significant amounts of iron and carbonate minerals able to neutralize the effects of the nitrites.

However, as is the case on Earth, nitrogen and its compounds occur commonly as gases in the atmospheres of planets and moons that have atmospheres.