A quick search on Google reveals the extent of this PIe pollution. Click this link to check it out!
So, I confess I don't know much about editing Wikipedia but it is easy!
Find a chart. Make your chart. Create a Wikipedia account. Use the upload wizard to get an image tag. Go to the Wiki page, click Edit, and paste the image tag there. And you're done.
There are way too many colors; the labels on the smaller pie pieces bleed onto their neighbors and the separation between natural and anthropogenic sources isn't as clear as it could be.
Here's what my revised version looks like:
In this case, I merely shrank the pie, using it as a legend. I also fixed the typo in the word anthropogenic.
You can do it too. Get started now! #onelesspie