Keyword
‘Global Warming’
‘Greenhouse gases’
‘Retreating ice glaciers’
‘Negative impacts’
‘Prevention’
‘Climatic change’, ‘Greenhouse effect’
‘Carbon dioxide’
‘Rise in sea level’
‘Harm caused’
‘Ways to reduce’
Impacts of Global Warming, What is greenhouse effect, How greenhouse gases contribute to Global Warming, Why is there a rise in sea level, Negative impacts of Global Warming, Ways to prevention and reduce global warming, etc.
Search engine: Yahoo
Keywords: Effects of Global Warming
URL: Http://en.wikipedia.org/wiki/Effects_of_global_warming
Hits: 33100000
Search engine: Mamma
Keywords: Causes of Global Warming
URL: http://environment.about.com/od/faqglobalwarming/f/globalwarming
Hits: 38
Search engine: Yahoo Search Directory
Keywords: Greenhouse Effect
URL: http://www.ucar.edu/learn/1_3_1.htm
Hits: 433
Search engines and meta search engines are machine-compiled, while subject directories are human-compiled. Therefore its more reliable.
Meta search engines find the most appropriate results which makes it more credible. However, search engines displays all results in order of relevance.
Search engines returns large amount of hits, which user can have large variety of websites to choose from. However, it is not as reliable and credible as meta and directory searches because of the large amount of irrelevant hits.
Meta search engines compile the most appropriate results which let users have more relevant and credible websites. However, the results found are very few.
Search directories are human-compiled and therefore the hits are the most reliable compared to the other two. However, the links must be reviewed 1st, therefore there will be a larger lag and loading time.
Search directories would best meet my searching needs. The links found are human-compiled which makes my search much more credible and reliable. Moreover the links are reviewed before posting, therefore it will be most related to my search.