[ImgBot] Optimize images

[imgbot[bot]]

Beep boop. Your images are optimized!

Your image file size has been reduced by 12% 🎉

Details

| File | Before | After | Percent reduction | |:--|:--|:--|:--| | /case-studies/img/stream-figure.png | 143.37kb | 92.86kb | 35.23% | | /challenge/food-waste-reduction-2/img/stream-figure.png | 143.37kb | 92.86kb | 35.23% | | /challenge/food-waste-reduction-2/img/annex-a-supply-chain.png | 138.01kb | 109.67kb | 20.54% | | /challenge/food-waste-reduction-2/img/gated-structure.png | 32.81kb | 28.54kb | 13.02% | | /challenge/food-waste-reduction-2/img/stream-c.png | 66.01kb | 59.29kb | 10.17% | | /challenge/food-waste-reduction-2/img/stream-d.png | 69.27kb | 62.88kb | 9.23% | | /challenge/food-waste-reduction-2/img/ab-stream-hero.jpg | 385.72kb | 350.88kb | 9.03% | | /challenge/food-waste-reduction-2/img/stream-c-and-d.png | 135.19kb | 124.38kb | 8.00% | | /challenge/food-waste-reduction-2/img/cd-stream-hero.jpg | 217.47kb | 201.10kb | 7.52% | | /challenge/food-waste-reduction-2/img/cd-stream-tile.jpg | 305.19kb | 286.30kb | 6.19% | | /challenge/food-waste-reduction-2/img/ab-stream-tile.jpg | 263.52kb | 256.51kb | 2.66% | | | | | | | **Total :** | **1,899.93kb** | **1,665.27kb** | **12.35%** |

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