1.social inspiration，the total percent，90% do trash classification
2.instant feedback and reward
3.process monitor and positive comment，not smoking keep you healthy not say it
will hurt your body, people will ignore risk when enjoy what they like with adventure or fluke mentality
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小谈
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署名-非商业性使用-相同方式共享 4.0 国际 (CC BY-NC-SA 4.0)
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