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Q. Dear Umbra,

Sometimes I ask for a to-go box when I’m eating out, but I’m always panged with environmental guilt when the server brings back a Styrofoam clamshell. But I hate wasting food, especially delicious restaurant food. Would it be better to leave my leftovers on my plate to be thrown away, or should I take them home at the cost of unrecyclable Styrofoam?