English, 29.11.2019 03:31, khaleesical9645

What was robert revelle's viewpoint on global warming?

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In the mid 1950s, not many scientists were concerned that humanity was adding carbon dioxide gas ( CO2) to the atmosphere by burning fossil fuels. The suggestion that this would change the climate had been abandoned decades earlier by nearly everyone. A particularly simple and powerful argument was that the added gas would not linger in the air. Most of the CO2 on the surface of the planet was not in the tenuous atmosphere, but dissolved in the huge mass of water in the oceans. Obviously, no matter how much more gas human activities might pour into the atmosphere, nearly all of it would wind up safely buried in the ocean depths. - LINKS -
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<=The oceansThere was a hidden flaw in this argument. It was discovered as an indirect consequence of work at the University of Chicago by Willard Libby and collaborators, scientists who had given the question scarcely a thought. In the mid 1950s, they were busy with an exciting new technique — the use of radioactive carbon-14 to find the age of ancient materials. The origins and motives of this technique were diverse, and so therefore was its support. The Chicago group was funded chiefly by the University and by a foundation dedicated to supporting anthropology and archeology. A crucial auxiliary technique, the enrichment of carbon isotopes, was developed because the isotopes were useful for medical research. But as was usually the case in nearly every field of postwar science, a substantial part of the support was indirectly related to the Cold War. Libby acknowledged that he was "also indebted to the Air Force... for a contract for the development of low-level counting techniques during 1949..." The Air Force had negligible interest in the dates of Egyptian mummies, but it had a hearty concern for delicate radioactivity measurements (one likely use was detecting residues from Soviet nuclear bomb tests). As Libby discreetly remarked, Chicago people built up expertise in measuring radioactivity "in other connections." The separation of isotopes was likewise under investigation for military as well as civilian uses. Thus carbon-14 research could incorporate more highly developed techniques than would have been available for archeology alone

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it is about the use of non animal tested cosmetics.

answered: Guest

modern day technological advancements are constantly seen throughout every aspect of life. cell phones, portable internet availability, laptop computers, ipods, mp3 players of every brand, and many other devices, are everywhere. they seem to possess unending possible detriments, but, along with such issues, technology also has positive impacts on today’s youth. in some situations, the internet and ipod prevent sociability, though in others they may be the cause of increased social activity. overall, modern technology has the capability to bring people together as well as enhance the social abilities of the today’s youth; however, if used without discretion, can also create a less interactive generation, frequently depending on technology for contentment.

the immense capabilities of the internet today are astonishing, and offer many positive opportunities for teens. primarily, the internet makes sharing information fast and simple, despite factors that in other cases would prohibit such simple distribution. according to jean-francois coget in source c, “with the internet, information can be transmitted and received with ease at any time of the day to and from any number of friends.” it is possible to send videos, pictures, papers, projects, and a quantity of other things with the click of a button. the transfer can happen in seconds. the amazing capability of modern day internet simplifies teenage life, by providing a way to convey knowledge. another way in which internet proves positive is by providing a way to keep in touch with friends and family worldwide, or just across town. whether it’s a friend that switched schools and is never around, or a family member in london, the internet makes it possible to email, instant message, and even video chat. such qualities of internet communication bring people together with more frequent contact, boosting sociability and relationships. in addition, the internet also has the capability to, “foster openness, self-confidence, and a greater sense of ease, and comfort in dealing with others” (source c). since it is not obligatory to reveal physical appearance or social status over the internet, it grants an opportunity to be a completely new person, who is entirely open and confident. internet chats, even with mere acquaintances, can supply a chance for socially challenged teens to experience a form of social interaction, in order to create a sense of composure. modern day internet advancements not only offer an easier way to share information, but also contribute to sociability by providing a way to communicate with distant friends and family, as well as giving socially challenged teenagers an opportunity for interaction.

likewise, another modern day technology, the ipod, may also have a positive effect on some teenagers, by presenting a different view of the world as well as uniting individuals through musical taste. in the eyes of kelly doyle-mace, in source d, “music deepens the experience of walking through the world, rather than detracting from it.” there are millions of songs out there, one to match every possible mood. sometimes, turning on just the right song can be motivational and provide a completely new outlook on a certain circumstance. in addition, lyrics are often relatable to personal life and can be significant or simply encouraging. another way in which ipods and personal musical taste is a positive effect on teens is by uniting people of different backgrounds and diversities through their music choice. lisa and johnny rocket, hosts of “ipod dj nights,” describe that one night a month they invite guests to bring their ipods to a london bar. where they can play whatever songs they choose (source d). “even more diverse than the music are the members… the ipod acts to bring people together,” lisa explains (source d). these gatherings prove that as diverse as music can be, it is also unifying. the multitudes of people attending these parties, from every race background and belief, are united through their assorted music taste. ipods have the potential to positively affect today’s youth by matching any and every mood with music, resulting in a deeper walk through life, as well as bringing people together by means of musical interest.

the alternative argument is that the internet can be a significantly negative influence on teenagers, if overused. constant internet use detracts time that could be spent with friends and family. hours wasted away typing useless messages is detrimental to personal relationships with the ones who really matter. it was discovered through a study in pittsburgh that people who use the internet most often are “spending less time talking with their families…keeping up with fewer friends” (source b). it is of no use to spend so much time talking to people over the internet, when one could just as easily walk down the stairs and spend time with family, or go to see friends instead. according to source

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English, 22.06.2019 04:00, elijahcarson9015

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