How can scientists promote peace?

This is a letter on Dr. Romanovsky's recent editorial, in which he asks, “How can a temperature scientist, or a scientist in general, contribute to peace in this world? He or she probably is not in a position to negotiate a cease fire in a confrontation area or prevent a new cold war. Nor can he or she reduce the world's nuclear arsenal, stop the arms race, or remove other countries' military bases from his or her own country. What can he or she do? What can we do?” [1]