Body Paragraphs

So let's review what you might want to put in an introductory paragraph, and a concluding paragraph. 

So a body paragraph needs the following:

1) Topic sentence
2) generalization(s)
3) specific details
4) a commentary on the detail, examples about why this is important.

So if you have a paragraph about C02 and climate change it might look like

CO2 emissions is one of the leading causing of climate change.  CO2 is a gas that is released by the burning of fossil fuels.  Currently there is 417 parts per million CO2 in the atmosphere.  This is more CO2 then there was 60 million years ago during the last great extinction period.

Of course you will want to cite your info.