It is started about 50 million years ago. Volcanic activity,  plant rot, and climate change caused large lakes to evaporate, leaving the world’s largest trona deposits on the Green River, Wyoming. Ancient Egyptians dug dry sediments on the seabed and used soda to make glass ornaments and vessels. The Romans used the soda to bake bread, made glass, and for  medicinal purposes. Soda has been used in production for over 5000 years. Until the 19th century, soda  was made from the ashes of plants grown in sodium-rich soil. This method was so popular so that the powder was named “Soda Ash”. Soda mined from today’s Trona deposit is one of the world’s most plentiful natural resources.