Plastics challenge

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<blockquote class="wp-embedded-content" data-secret="gMsD6zfKS5"><a href="https://practicalaction.org/schools/plastics-challenge/">Plastics challenge</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://practicalaction.org/schools/plastics-challenge/embed/#?secret=gMsD6zfKS5" width="600" height="400" title="&#8220;Plastics challenge&#8221; &#8212; Practical Action" data-secret="gMsD6zfKS5" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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