In addition to carbon, the nutrients essential for living organisms include nitrogen and phosphorus, which are minor constituents of seawater and thus are often limiting factors in organic cycles of the ocean.
The philosopher Bertrand Russell believed that leisure was essential for living the good life and claimed that we could only think big thoughts and come up with new ideas when given time off to rejuvenate.
Residents of Davenport, 70 miles downriver, where flood waters crested just below the '65 level last week, understand all the way from their feed caps to their waders that a certain flexibility -- work your usual shift, but in a boat if necessary -- is essential for living with nothing between you and the lovely, unruly Mississippi.
Water of high and acceptable quality is essential for living beings.
Coal, being primary source of energy is essential for living and sustainable advancement of any nation.
Metal elements, such as Fe, Zn, Mn and Cu, are essential for living organisms and present as ions.
Copper is a trace element essential for living creatures, but copper content in soil should be controlled, as it is toxic.
Satisfying these complex needs - mastering all of these factors - will be essential for living wall systems to mature beyond their use as vanity projects and gain acceptance by the construction industry.
There's no doubt that taking the time to connect with people is essential for living well as you age.
Mg2+ is a divalent ion essential for living organisms that works as a regulator and co-factor in many proteins, stabilizing membranes, ribosomes and other cellular structures [28].
