Chapter 19: Are there rare earths in combustion vehicles? Je veux recevoir cette page par mail pour la lire plus tard According to the analyses made by the HES-SO Valais, the results are clear, there are some. Sources: results 1, 2, 3, 4, and images 5, 6, 7, 8, 9, 10, 11, 12, 13, 14.