Ziska, a lanky, sandy-haired weed ecologist with the Agriculture Research Service of the U.S. Department of Agriculture, matches a dry sense of humor with tired eyes. The humor is essential to Ziska’s exploration of what global climate change could do to mankind’s relationship with weeds; there are many days, he confesses, when his goal becomes nothing more than not ending up in a fetal position beneath his battleship gray, government-issue desk. Yet he speaks of weeds with admiration as well as apprehension, and even with hope.
It is easy to share the admiration and apprehension when you consider the site that Ziska planted with weeds in downtown Baltimore in the spring of 2002. Tucked in next to the city’s inner harbor, the site is part of a barren expanse of turf rolled out over a reclaimed industrial landscape. This unfertile scrap seems an unlikely choice for growing anything, but Ziska saw in it, ominously perhaps, a model of where the global habitat as a whole is headed.
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