Papers made especially for Valentine greetings began to be marketed in the 1820s, and their use became fashionable in both Britain and the United States. In the 1840s, when postal rates in Britain became standardized, commercially produced Valentine cards began to grow in popularity. The cards were flat paper sheets, often printed with colored illustrations and embossed borders. The sheets, when folded and sealed with wax, could be mailed.
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Earth Day is a day that is intended to inspire awareness and appreciation for the …