The level of the sea is rising aroundthe earth because of___

The level of the sea is rising aroundthe earth because of___ The level of the sea is rising aroung the earth because of__ The rising of sea... （）of its surface of the earth is sea. 1.The sea level ___slowly because of the Greenhouse Effect.I the problem of the global warming is serious._,the sea level three-fourths of the surface of the earth ( ) sea 是is 还是are? the mountain is 1000 feet ( )the sea level three-fourths of the surface of the earth ( ) sea The Grand Canyon is one of___ of the natural world. 翻译句子：the sea level is getting higher and higher. The sea level on both sides of the Grand 为什么LEVEL是单数?