The advantage of reverse-engineering a news story in this way is that good newspapers *should* cite the source of their underlying data.

In this case, the Guardian has a link to 'Get the Data' embedded in their article: http://www.guardian.co.uk/news/datablog/2011/jan/31/world-carbon-dioxide-emissions-country-data-co2#zoomed-picture

Go and take a look at the link. It allows you to download the data set directly, and also gives a link to the sourcepage (top left of the spreadsheet).

Some points to remember:

1) It's good practice to go to the source website rather than simply downloading the relevant dataset. Whilst on the site, you might well spot another useful data set, some extra metadata, or something else that gives you a better sense of the data's context.

2) Always double check the license!

3) Look carefully for metadata. Make a note of anything that seems significant.

If you follow through the links on this particular article, you end up at http://www.eia.gov/cfapps/ipdbproject/IEDIndex3.cfm?tid=90&pid=44&aid=8 - the US Energy Information Administration.

Take a moment to explore the page.

- Note the license (See 'Policies > Copyright & Reuse' at the bottom of the page. This data is definitely open, and there are also guidelines as to *how* to accredit the data - take note).

- Now that you're happy that the data is open, have a play! The website allows you to explore different indicators, different years, different regions, different units. Find anything particularly interesting? Share it below.