فروشگاه فایل یاب

                نوع فایل: power point فرمت فایل: ppt and pptx قابل ویرایش 54 اسلاید   قسمتی از متن پاورپوینت: Interesting Facts:   The first wind machine was used in ancient Persia around 300 BC1.   One wind turbine can produce enough electricity to power 300 homes.   Renewable energy sources create three times more jobs than fossil fuels.   Albert Einstein2 won the Nobel Prize in 1921 for his experiments with sol ...