Use relative clauses

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see

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that it's not so complicated and quite

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simple to add to your essays or your

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reports or your articles

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to to make it more advanced and more

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sophisticated so an example of a

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non-defining relative clause is climate

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change which has been an issue for many

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decades will continue to be a problem

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so here we have

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climate change will continue to be a

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problem

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that's a sentence on its own but if you

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put a non-defining relative clause in

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the middle between the commas

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then you're adding extra non-essential

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information it's not defining the

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subject

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it's just extra information so climate

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change which has been an issue for many

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decades will continue to be a problem a

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quick look at a defining relative clause

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the issue which concerns most people

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nowadays is climate change so here

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the clause that relative clause

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is not between commas because it's a

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defining relative clause it's defining

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issue so which issue is it because there

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are many issues but you need to define

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which issue with the clause so in this

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case the issue which most people are

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worried about that particular issue

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is climate change so it's it's essential

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information