वायु ऊर्जा, प्रवासी पक्षी, पवन ऊर्जा, हवा, टूटना, शांत स्थान, आराम करें, उत्तरी सागर, फ्लाइंग, कुछ कलहंस, ऊर्जा
Public Domain
प्रासंगिक तस्वीरें
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