Thanks to my daughter, I have become thoroughly sensitized to environmental issues. Recently I purchased a greeting card, and when the cashier started to place it in a plastic bag, I remembered my daughter’s repeated warnings and immediately declined its use.

"I’ll be mailing that quickly," I told the clerk. "You can take the bag back."

"Okay. Have a good day," she said with a smile. Then I watched as she scrunched the bag into a ball and tossed it into the garbage.