Scientists have begun to account for the topsy-turvy carbon cycle of the Colorado River Delta – once a massive green estuary of grassland, marshes and cottonwood, now desiccated dead land. At the Colorado River delta, cheniers of dead clam shells epitomize the carbon dioxide being  added to the atmosphere upstream [Credit: Jansen Smith]"We've done a lot in the United States to alter water systems, to dam them. The river irrigates...

[[ This is a content summary only. Visit my website for full links, other content, and more! ]]