Here is the link to today's powerpoint:
https://docs.google.com/presentation/d/1DUbhCvIVb3tpYUNVVyCuosqV8F0ECe_rxDclPodDorI/edit#slide=id.gae7738682_0_133
More about gyres;
http://thekidshouldseethis.com/post/46421369790
(what plastic objects are doing to planet's waters)
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