സെന്റ് ക്രിസോസ്റ്റംസ് എച്ച്.എസ്. നെല്ലിമൂട്/അക്ഷരവൃക്ഷം/THE CHANGING ENVIRONMENT
THE CHANGING ENVIRONMENT
The earth of ours has changed tremendously once it used to be molten lava . Then it cooled down and mountains and oceans formed. Millions of years later , life sprouted on earth. Thus it is evident that the earth's environment under goes changes all the time. But it is so gradual that we hardly noticed it.
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