28. संघवाद भारत में क्यों सफल हुआ है। इस सफलता के लिए भारत में कौन-कौन सी
नीतियों को अपनाया? व्याख्या कीजिये।
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Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.
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