A warm winter (second-warmest on record for Austria) led to an unusually early bloom of wildflowers, a sure sign that global warming is displacing the seasons. For me, that means greeting the first wildflowers of spring with mixed feelings. On one hand, long-term concerns about climate change are intensifying. Just this week, leading climate researchers published yet another doomsday study, projecting that, in a worst-case scenario, Planet Earth could see real trouble by the end of this century, with enough sea level rise to swamp major cities and potential superstorms in the Atlantic Ocean that would dwarf hurricanes like Irene and Katrina. On the other hand, it’s hard not to feel a little pang of joy when those first splotches of color start to appear in city gardens or country forests.