Finding good data

Before we look at reputable sites, try this with your teacher:

http://www.princeton.edu/~otorres/FindingData101.pdf

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  https://trends.google.com/trends/explore

 https://finance.google.com/finance   

Let's say I want to search data points to examine global warming.

 I quickly type in "data points for global warming" and this what I get:

Now, let's SIFT this first result:

https://newatlas.com/climate-change-database-millenia/50446/

I see that this site seems to be emotional, so I check its references for good measure, which leads me to this:

https://www.nature.com/articles/sdata201788

Which site is the better source?