How Phosphorus Helped Feed a World — And an Invasion of Algae

The world has heard all about how algae has spread harmfully in large waterways. Now a new book, “The Devil’s Element,” zeroes in on phosphorus, which not only helped feed humanity but also fueled algae’s dangerous blooms. Plus, why soap bubbles turned out to be bad for the environment. A review of the new volume, from BookShelf Editor Tom Henry.