How can we help the environment? , Sing a song !, CONGRATS! One candy for you !!, NOOOW! you are a teacher! explain what did you understand., Why are mounds important to the soil?, Trees are cut down to build ....................., Rocks and stones are dug up to make ..............., The exhaust from cars and trucks can pollute the .............., Trash can pollute .................. and .................., What are the negative effects of building dams?.

Environmental changes

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