Hi 
I do face the image problem when I share articles from certain sites like The Guardian and Forbes. I have found a workaround it as follows:
share the article on dlike as you do for any article.
right click (shift + F10) on the image in the original article and copy the image address
go to steemit and edit the article by posting the image address where it should be.
You now have the original image appearing in dlike, steemit and elsewhere on steem blockchain!
RE: Offshore windfarms 'can provide more electricity than the world needs' | Environment | The Guardian