HELP ME WITH MY ESSAY ABOUT CCTV cameras

I seperated my essay into several parts and submit it to here since the word count is limited. Please  help me to make the grammar accurate and more academic. I'm studying a pre-master course. So I wish my writing could be much more academic. Thanks a lot.

INTRODUCTION
For a long time, Closed circuit television (CCTV) cameras have been a controversial issue. [How long?]

The question of whether more CCTV cameras should be installed has been widely debated by both positive and negative opinions.    [There is no such thing as a positive and negative opinion, unless you are discussing Metaphysics. The correct terminonology  would refer to advocacies FOR  or AGAINST increased use of CCTV Cameras, and not an Electromagnetic Polarity for  something designated an OPINION.  OPINIONS, in other words, are not part of the Electromagnetic Spectrum.]

It is generally known that CCTV cameras as the product of high technology  [and society  does not belong here as it is not logically coherent with the rest of the sentence.] have been utilised by most countries around the world.

 In current society, the amount of CCTV cameras keeps increasing as a result of its effective function which monitors and records images of what happened in specific place in real time (Harwood, 2008).

However, among all the countries which install CCTV cameras as a security measure, Britain owns the largest number of CCTV Cameras (around 4.2 million) which is estimated that 1 person will be watched by 300 cameras in a single day on average(Cole, 2004).

Since CCTV cameras are usually exist in both private location and public space, they can control every activity.   [But think about this.  Cameras do not exert control over activity.] 

[happened in time as play a vital key in crime prevention.   This is a leftover. You can possibly re-work it and put your thought back into the essay.]

 Meanwhile, problems and doubts have been raised in association with the existence of CCTV cameras. This essay will argue that CCTV camera decreases crime rate for citizens, improve efficiency of handling cases for police and help business to manage effectively. [Perhaps, but a factual evidence which supports the claim is necessary.  Publishing facts is so much more effective than publishing a personal opinion.  ]

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 Paige, this is an excellent subject for an essay.  Some re-thinking in terms of the Cause/Effect Relation will greatly benefit this.

   Perhaps I can help you with it Again?

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