cccThethinbluelineofourplanetthatwecanseefromspaceiswhatmakesourEarthuniqueinthewholeuniverse.Theoxy[展开全部]
cccThethinbluelineofourplanetthatwecanseefromspaceiswhatmakesourEarthuniqueinthewholeuniverse.Theoxygenintheatmospheresustainalllifeformontheplanet.SeehowaflyingriverinSouthAmerica,ashiftingdust-stormthroughtheAtlantic,collapsingglaciersintheArcticandthetiniestyetthemostcrucialcreatureintheworldhelpusalljusttobreathe.[收起部分]