Presently, the mean temperature of the valley is about 10 °C (50 °F). Annual precipitation is less than 300 millimetres per year (12 in/year) and much less than the annual evaporation rate of 1,520 millimetres per year (60 in/year). Thus, permanent lakes cannot exist in the Estancia Valley under present-day conditions. The climate is characterized by Pacific cyclones during winter and the North American Monsoon during summer, which deliver moisture coming from the Gulf of California, Gulf of Mexico and the Pacific Ocean. Groundwater recharge occurs mainly during winter.
cows are the most destructive and the most invasive species on earth probably except for human. the total mass of cows on earth is ten times greater than the total mass of every bird, mammoth, reptile and amphibian combined.