When the global average atmospheric temperature changes over a period of at least three the earth’s climate can be said to have changed.

For a period of at least three decades.

Explanation:

It is considered as climate change the variations of temperatures that the planet has had, these changes can be for a prolonged time (decades). Some time ago, the earth began an increase in temperature, known as global warming; this has caused different effects on the planet, for example, more improvements in temperatures.

Scientists continue to investigate climate changes by comparing past and current changes; they want to find solutions to maintain a balance to keep temperatures on the planet.

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all freedom fighters demanded for constitution. so british finally granted india it's freedom. then a constituent assembly was formed. it's chair man was rajendra prasad and its deputy chairman was dr. br ambedkar.

this assembly take the time of about one year than our constitution was finally formed.

explanation:

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