In a controversial article on the Eco-Centric TIME blog today, Bryan Walsh argues that organic farming is not efficient enough to be sustainable. Or his argument runs somewhere along those lines. Walsh seems to believe yield-per-acre is the same thing as "efficiency." For no clear reason, he keeps asserting that conventional agriculture is more efficient, presumably on ecological grounds, and then only explains himself by quoting statistics on how much more productive industrial agriculture can be per unit of land, while referring vaguely to the downsides of clear-cutting more forest. “Efficiency” can be such a slippery, dangerous goal, because it is value-neutral. I just took off my gardening gloves and put on my rebuttal gloves. Let’s get into it.