Paraguay (2006)
Solar cooking is been promoted in a big way by an NGO body. It is the simplest, safest, most convenient way to cook food without consuming fuels or heating up the kitchen. Solar cooking was also introduced in postage stamps. Two countries - Paraguay and Tanzania - have each issued stamps depicting solar cooking theme.
Tanzania (2004)
The Tanzania stamp was actually about Girls Guide scouting activities. It somehow show how to do the solar cooking.
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