Cattle on a farm---Â©

According to the U.S. Department of Agriculture, there are nearly 100 million cattle afoot in the United States today. Those ruminants, in the words of Brent Kim of the Center for a Livable Future, have a â€œpenchant for belching methane, a potent greenhouse gas.â€ By several estimates, they add 140 teragrams—a teragram being the equivalent of a megaton, or a million tons—of methane to the atmosphere each year. It stands to reason that all that methane contributes to climate change, to which must be added the, ahem, inputs from Canada, Australia, and other livestock-exporting nations. Given that at their most populous, the total count of naturally occurring ruminants such as bison never exceeded 30 million, itâ€™s clear that our industrial system of food production has at least something to do with the weird weather going on outside—one more reason, as activists urge, for meat-eaters to reduce their consumption in an attempt to restore something of the bygone balance.

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Meanwhile, speaking of gas, the BP oil spill in the Gulf of Mexico seems, at this writing, to have been contained. The effects are likely to be long-lasting, however. Notes researcher Paula Mikkelsen, now a visiting fellow at Cornell University after a long career at the Harbor Branch Oceanographic Institution and the American Museum of Natural History, there are more than 15,000 species of animals and plants resident in the Gulf of Mexico, most of them below the surface of the waters. There are no rescue or cleanup procedures for them of the sort that have been developed for creatures that spend time on land, such as those poor oil-drenched terns and pelicans (but not walruses, per BPâ€™s emergency manuals) that weâ€™ve all seen on television; all that we know is that oil in the water or in their food is a potential killer. We can all heave a sigh of relief—but the work of cleaning up the Gulf is just beginning. Weâ€™ll be following events here, so stay tuned.

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The amphibians, members of the class Amphibia, that is, collectively represent the group of vertebrates that are most in danger of decline and extinction on the planet. There are many reasons, foremost of them ever-quickening habitat loss. Just how rapid and thoroughgoing is the disappearance of those amphibians we do not completely know, which occasions an unprecedented project sponsored by Conservation International in which scientists will visit 18 countries in Latin America, Asia, and Africa to search for some 40 species of amphibians that have not been seen recently, such as Costa Ricaâ€™s golden frog, last observed in 1989. (For a gallery of ten of those amphibians, see here.) Notes the Conservation International announcement, â€œAlthough there is no guarantee of success, scientists are optimistic about the prospect of at least one rediscovery.â€ Letâ€™s hope their optimism is well founded.

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Itâ€™s not fair to those creatures—penned ruminants, oil-soaked terns, disappeared amphibians—that the needs of our species have trumped the needs of theirs. We can recognize that lack of fairness. So, too, can other primate relatives of ours, a sense of fairness, it seems, being ancestral and deeply ancient. So observes the noted primatologist Frans de Waal in a recent blog posting over at Scientific American. Observing the behavior of our own kind, he adds, hopefully, â€œWeâ€™re considerably less selfish and more social than advertised.â€ All that remains to be done is to extend that sense of society to all those species beyond Homo sapiens.

Gregory McNamee

Image: Cattle on a farm—©