I think the word 'recreation'(activities for enjoyment) should have been written 're-creation'(create again).The recreation of Soviet-style state-trading will exacerbate aggravate anxieties of food-importing countries about their dependence on the international market, which has been severely disrupted this year after exporters, including Russia, imposed prohibitive foreign sales duties or export bans.
The difference between exacerbate and aggravate is subtle indeed, so much so that the writer was undecided which one to use! One of the words should have been deleted obviously. I would delete aggravate and use exacerbate - exacerbate anxieties. Aggravate is used for problems and conditions(especially medical). I can't pin-point the exact difference though.
not a teacher