The number reflects the vegetation growing season, which removes carbon dioxide from the atmosphere. The count hit 415 this past May, as the growing season began.
A daily record of global atmospheric carbon dioxide concentration, as measured at the Mauna Loa Observatory in Hawaii.
It's always interesting and informative, with links offering a world of bird photos and text. Take a look.
Dinosaur facts and figures, illustrated. An amazing book.
New field guide published, a wonderful guide retires
New book gives insight into fires in Brazil
Another revealing book by Katrina van Grouw
Web site has addresses
Report shows economic contributions made to communities hosting the refuges. And then, read the piece on bird tattoos, tats for people, not birds.
Dragonflies and Damselflies
Bird art compared to that of Minnesota's Francis Lee Jaques
Book reviews follow this post
Resident gander protects his pond
Palm Warbler, early migrant
Thursdays and Saturdays in May
Slushy pond is a problem
She on her nest. Gander is standing by
He was a prolific contributor to the birding world
Sandhill Cranes in Nebraska