New ELI’s are published every two weeks, with the current one focused on shrinkage of clays, which is a topic that is related to expansive (clay) soils, a geologic hazard prevalent in southern California. Expansive soils and the damage they can cause to structures founded on them costs approximately $2.3 billion yearly in the United States. This is more than twice the annual cost due to damages caused by flooding, hurricanes, tornadoes and earthquakes combined.
ELI’s website address is http://www.earthlearningidea.com/index.html, and the current ELI can be found at http://www.earthlearningidea.com/PDF/159_Shrinking_clay.pdf. I encourage all of my teacher friends and relatives to visit the site and utilize the information provided.