Question: What rare materials are needed for life on earth?
About the article "Biochemistry", section "Starting materials: the chemical elements of life".

Candidate passages:
Earth materials is a general term that includes minerals, rocks, soil and water.
These are the naturally occurring materials found on Earth that constitute the raw materials upon which our global society exists.
Earth materials are vital resources that provide the basic components for life, agriculture and industry.
Earth materials can also include metals and precious rocks. 
The hypothesis concludes, more or less, that complex life is rare because it can evolve only on the surface of an Earth-like planet or on a suitable satellite of a planet.
Some biologists, such as Jack Cohen, believe this assumption too restrictive and unimaginative; they see it as a form of circular reasoning.
According to David Darling, the Rare Earth hypothesis is neither hypothesis nor prediction, but merely a description of how life arose on Earth.
In his view Ward and Brownlee have done nothing more than select the factors that best suit their case.
What matters is not whether there's anything unusual about the Earth; there's going to be something idiosyncratic about every planet in space.
What matters is whether any of Earth's circumstances are not only unusual but also essential for complex life.
So far we've seen nothing to suggest there is.
Critics also point to a link between the Rare Earth Hypothesis and the creationist ideas of intelligent design. 
Around two dozen of the 92 naturally occurring chemical elements are essential to various kinds of biological life.
Most rare elements on Earth are not needed by life (exceptions being selenium and iodine), while a few common ones (aluminum and titanium) are not used.
Most organisms share element needs, but there are a few differences between plants and animals.
For example ocean algae use bromine but land plants and animals seem to need none.
All animals require sodium, but some plants do not.
Plants need boron and silicon, but animals may not (or may need ultra-small amounts).
Just six elements—carbon, hydrogen, nitrogen, oxygen, calcium, and phosphorus—make up almost 99% of the mass of a human body (see composition of the human body for a complete list).
In addition to the six major elements that compose most of the human body, humans require smaller amounts of possibly 18 more.
Those who believe that extraterrestrial intelligent life does not exist argue that the conditions needed for life—or at least complex life—to evolve are rare or even unique to Earth.
This is known as the "Rare Earth" hypothesis, which attempts to resolve the Fermi paradox by rejecting the mediocrity principle, and asserting that Earth is not typical, but unusual or even unique.
While a unique Earth has historically been assumed on philosophical or religious grounds, the Rare Earth Hypothesis uses quantifiable and statistical arguments to argue that multicellular life is exceedingly rare in the universe because Earth-like planets are themselves exceedingly rare and/or many improbable coincidences have converged to make complex life on Earth possible.
It is possible that complex life may evolve through other mechanisms than those found specifically here on Earth, but the fact that in the history of life on the Earth only one species has developed a civilization to the point of being capable of space flight and radio technology lends more credence to the idea of technologically advanced civilizations being rare in the universe.
For example, the emergence of intelligence may have been an evolutionary accident.
Geoffrey Miller proposes that human intelligence is the result of runaway sexual selection, which takes unpredictable directions.
Steven Pinker, in his book "How the Mind Works", cautions that the idea that evolution of life (once it has reached a certain minimum complexity) is bound to produce intelligent beings relies on the fallacy of the "ladder of evolution": Since evolution does not strive for a goal but just happens, it uses the adaptation most useful for a given ecological niche, and the fact that, on Earth, this led to technological intelligence only once so far may suggest that this outcome of natural selection is rare and hence by no means a certain development of the evolution of a tree of life.
Another hypothesis estimates that evolution to the stage of intelligent life required about ten billion years, rather than five billion years normally assumed.
This implies that the first five billion years of our own evolution occurred in other locations, for instance planets that existed before the Earth.
According to this hypothesis, intelligent life is rare because evolution has only now reached the stage where intelligent life has a reasonable probability of occurring.
(See Enough time elapsed since the big bang for evolution to occur.
)Another hypothesis along these lines is that, even if conditions needed for life are common in the universe, the initial abiogenesis on a potentially life-bearing planet – the formation of life itself – the existence of a complex array of molecules that are simultaneously capable of reproduction, extraction of base components from the environment, and obtaining energy in a form that can be used to maintain the reaction, might ultimately be very rare.
Additionally, in the nondirectional meandering from initial life to humans, other low-probability happenings may have been the transition from prokaryotic cells to eukaryotic cells (with separate nucleus, organelles, specialization, and a cytoskeleton allowing the cell to take on different shapes) and the transition from single-cellular life to multicellular life, which was recorded in the Cambrian Explosion of 530 million years ago when significant numbers of organisms evolved hard body parts, although multicellular life perhaps first started to evolve a couple of hundred million years before that.
Single celled life emerged c. 3.5 billion years ago, and for most of Earth's history and for reasons not fully understood there have only been single-celled creatures.
And even fundamental conditions such as the chemical composition of the nursery nebula from which a planetary system forms could have unusual or detrimental consequences for the emergence and survival of life.
And there are many other potential branching points.
For example, perhaps the transition from ocean creatures to land-dwelling creatures crucially depends on an unusually large moon and significant tides.
Many astronomers refer to our Earth-Moon pairing as a double planet.
This ratio between parent and satellite is rare in our planetary system.
There is no observational data on the numbers of "double planets" in other planetary systems.
The obliquity of Earth's axis of rotation is 23.5° with 1.5° variation over 41,000 years.
Mars has an obliquity of 25° with 10° variation over 100,000 years, and calculations indicate over longer time periods, Mars' obliquity changes chaotically, perhaps ranging from 0° to 60° over the last 10 million years.
With no Moon to act as a stabilizing influence, Earth's obliquity might also wander chaotically.
It is also possible that intelligence is common, but industrial civilization is not.
For example, the rise of industrialism on Earth was driven by the presence of convenient energy sources such as fossil fuels.
If such energy sources are rare or nonexistent elsewhere, then it may be far more difficult for an intelligent alien race to advance technologically to the point where humans could communicate with it.
There may also be other unique factors on which our civilization is dependent.
For example, in a planet covered with water, where intelligent life takes the form of creatures similar to dolphins, it may be difficult or impossible to discover fire or forge metals.
Another possibility is that Earth is the first planet in the Milky Way on which industrial civilization can arise.
However, critics note that, according to current understanding, many Earth-like planets were created many billions of years prior to Earth, so this explanation requires repudiation of the mediocrity principle.
Insofar as the Rare Earth Hypothesis privileges life on Earth and its process of formation, it is a variant of the anthropic principle.
The variant of the anthropic principle states the universe seems uniquely suited towards developing human intelligence.
This philosophical stance opposes not only the mediocrity principle, but also the wider Copernican principle, which suggests there is no privileged location in the universe.
Opponents dismiss both Rare Earth and the anthropic principle as tautological—if a condition must exist in the universe for human life to arise, then the universe must already meet that condition, as human life exists—and as an argument from incredulity or lack of imagination.
According to this analysis, the Rare Earth hypothesis confuses a description of how life on Earth arose with a uniform conclusion of how life "must" arise.
While the probability of the specific conditions on Earth being widely replicated is low, we do not know what complex life may require in order to evolve. 
Large tank trucks are used for example to transport gasoline to filling stations.
They also transport a wide variety of liquid goods such as concrete, milk, water, gasoline, diesel, and industrial chemicals.
Tank trucks are constructed of various materials depending on what products they are hauling.
These materials include aluminum, carbon steel, stainless steel, and fiberglass reinforced plastic (FRP).
Some tank trucks are able to carry multiple products at once due to compartmentation of the tank into 2, 3, 4, 5, 6 or in some rare cases more tank compartments.
This allows for an increased number of delivery options.
These trucks are commonly used to carry different grades of gasoline to service stations to carry all products needed in one trip.