These are some of the databases that you will want to look at to find articles about your topic.
Academic Search Complete is a good place to start, but contains both scholarly material and more general interest, non-scientific material. The magazine BioCycle, which promotes the use of sewage sludge to grow food, is in Academic Search Complete. Make sure you are aware of the type of material you are using.
Another item you might want to use is the newsletter Inside EPA's Climate Extra. This is contained in the Nexis Uni database which includes a wide range of newspapers, government publications and legal research.
Google Scholar can be useful for finding resources in addition to the resources you will find in the databases. Google scholar will also help you trace citations. Looking at who is citing an article can be an excellent way to move the research forward. If you find a very useful article that may be a bit older than you would like, use Google Scholar to see who has cited it.
For example, see the article citation below, "Particulate Air Pollution":
It looks promising, but was written before you were born.
If you click where it says Cited by 51, you will get the 51 articles citing this research.
You can also search within the citing articles to make your search more targeted. (See Below)
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