Within ten years those same reaches of the river were to be transformed from a virtual avian void to a refuge for many species of water birds, including a wintering population of up to 10,000 wildfowl and 12,000 waders. ”
बेशक, यह पृथ्वी के एक छोटे हिस्से में केवल एक बदलाव का वर्णन करता है ।