20% of the Earths crust is made up of non-silicate minerals
Dozens of tower cranes dot DC's skyline, and so many of them are building new high-rise apartments that the District now ranks ninth among US cities with the most housing units under construction. It sure looks like a lot of new housing supply is being built, and certainly plenty of new luxury apartments within the District. However, the downtown high-rises under construction only tell half the story of Greater Washington's housing growth story.
While all those cranes are easy to see from afar, what isn't immediately apparent from the airport (but might be from a plane) is that many fewer acres of the countryside around us are being bulldozed for subdivisions–which for the past century has been where most lower-cost, low-rise housing was built. As a result, the region as a whole isn't building enough housing for our rising population.
Reducing sprawl is good, but we haven't built enough housing in city cores to meet demand
Fewer than half as many single-family houses are being built at the suburban fringes of Greater Washington every year, compared to the region's long-range average. Taken together, the single-family houses that aren't being built around Greater Washington each year would cover four square miles–an area the size of Rock Creek Park. The slower pace of suburban development over the past ten years has meant tens of thousands of acres of farms and forests around our region haven't been bulldozed for subdivisions and strip malls.
The necessary element that forms part of the structure of dna and rna is <u>phosphorous</u><u>.</u>
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- A crucial part of DNA, the genetic "memory unit" of all living organisms, contains phosphorus.
- It is also a part of RNA, which reads DNA's genetic code to create proteins and other substances necessary for plant structure, seed production, and genetic transmission.
- All tissues and cells require phosphorus for growth, upkeep, and repair, as well as for the synthesis of DNA and RNA, the genetic building blocks.
- The nucleotides in a DNA sequence are joined by an alternating grey-dark grey sugar-phosphate backbone.
- The structural structure of nucleic acids, including DNA and RNA, is composed of the sugar-phosphate backbone. This molecule's directionality is determined by this backbone, which is made up of alternating sugar and phosphate groups.
- All living things require RNA as a vital component, and the phosphorus (P) it contains cannot be substituted.
learn more about phosphorous here: brainly.com/question/25352398
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