famine, aridity, drouth, inundations, floods, scarcities, desertification, rainfall, winterkill, rains, epidemics, crops, harvests, cyclones, salination, deluges, storminess, disasters, soil erosion, heatwave, hailstorms, salinity, winters, el nino southern oscillation, monsoons, malnutrition, deforestation, storms, anticyclones, overexploitation, frosts, hydrologic cycle, shortages, outbreaks, crises, subtropics, climate change, hydrological, calamities, icecaps, hunger, millets, leaf scorch, cropland, glaciation, potato blight, cold snap, typhoons, undernutrition, volcanism, belg, parch, sahel, biodiversity, tropics, armyworms, semiarid, evapotranspiration, fallows, climates, climatological, precipitation, overfishing, undernourishment, influxes, ecologies, frost heaving, earthquakes, dieback, megafauna, nitrogen fixation, holocene epoch, el nino, global warming, dust bowl, latitudes, acidification, defoliation, matto grosso, catastrophes, freshwater, oligocene epoch, poleward, drier, irruptions, glaciers, cowpea, deglaciation, bunchgrass, halophyte, urbanization, desiccation, pastoralism, deltaic, miocene epoch, spruce bark beetle, faunas, depressions, eutrophication, shelterbelts, streaks, ecosystems, drought, famines, bouts, slumps, conflagrations, rainstorms, snowfalls, downpours, flooding, outages, rainfalls, shutdowns, freezes, hurricanes, recessions, relapses