Re: Can someone please correct this sentence??
Welcome to the forum.
Originally Posted by DavidMax
The simple answer to your question is no. As you can see from my amendment above, the second part should not stand alone as it is not a complete sentence. I have removed the full stop and replaced it with a dash, then a lower case "m". The single two-part sentence is now fine.
Also note that I deleted the word "of" in the first part. We "point out" something. You do not need to capitalise the word "mining" unless it is at the beginning of a sentence or the beginning of a quote.
You don't really need the word "activities" either, although I have left it in. You could have just said "... the disadvantages of mining - mainly, ..."
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.