(1) Harvesting can severely deplete wild populations that are already hampered by restricted ranges, harsh environments and low levels of seed production.(2) Moss adds that chemotherapy and radiation deplete antioxidants so severely that it's necessary to take supplements to maintain normal levels.(3) Britain, for example, is likely to become a net exporter of gas in the next two years as its North Sea supplies deplete at a time when demand is rising.(4) Soils that remain saturated deplete soil oxygen and reduce or prevent root growth, resulting in overall plant decline.(5) Irrigation, of course, not only depletes groundwater but reduces surface flow too, with dams and diversions that cause downstream desertification and the loss of productive wetlands and freshwater fish stocks.(6) With the crashes and groundings, the small force of heavy attack fire bombers has been severely depleted .(7) Responding to major depletions of marine fish populations and other wildlife killed in the process of fishing, marine conservation groups became a force in national and international environmental policy.(8) To get back to what I said earlier about the depletion of the national sheep flock, I have one or two more instances to highlight.(9) Farming practices did not change or adapt at the same pace, however, such that soil fertility was severely depleted in these areas.(10) My stamp collection is severely depleted , and I miss standing over the kettle every so often steaming off unused second-class stamps.(11) About every 15 years the nearby supplies of wild game and firewood would become depleted , and the farmed soil would become exhausted.(12) This change is only partially driven by climate change concerns, as the major driver is the realisation that fossil fuels are depleting rapidly.(13) The first problem McCall encountered on his return was a severely depleted player roll.(14) By the twentieth century the dry forests were severely depleted and degraded.(15) Their stocks were severely depleted by whaling, and they remain low.(16) The immune system can be severely depleted , with the suppression of immunity allowing infection to overwhelm the body while defenses are down.