I've already posted a useful tree with the built-in toilet. Here are some plants that should protect people against unwanted pregnancies.

Millions of people use them every day but have you ever wondered how they are made? Here are some photos from a condom factory that makes 17 million condoms a year.The production starts from latex. The long tubes are dipped into the latex to make a form, then as the line moves forward the extra latex drips off and the forms are dried. In order make ultra thin condoms the line moves slower so more latex can drip off. Then the forms are dipped into latex again. Afterwards small brushes curl up the ring. Then the condoms go into the vulcanizing chamber where they get their milky color. In order for