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ঘ ইউনিট ১৯৯৮-১৯৯৯ || ঢাকা বিশ্ববিদ্যালয় || 1998

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ঈশ্বরচন্দ্র বিদ্যাসাগর
বেগম রোকেয়া
কাজী নজরুল ইসলাম
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বাঙালিদের
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ব্যক্তিগত গ্রন্থাগার মালিকদের
ধনীদের
পৃথিবীর সম্পদ ভাগ করা
জ্ঞান ও বুদ্ধি দিয়ে পৃথিবীকে জয় করা
জীবনের বিকাশ সাধন করা
পৃথিবীর রহস্য সন্ধান করা

The Earth's climate changes. It is vastly different now from what it was 100 million years ago when dinosaurs dominated the planet and tropical plants thrive in high latitudes. It is different from what it was even 18,000 years ago when ice sheets covered much more of the northern hemisphere. In the future, it will surely continue to evolve. In part, the evolution will be driven by natural causes, such as slow changes in the Earth's orbit over many thousands of years. But further climatic change, unlike that of the past, will probably have another important source as well as human activities. 

The earth will continue to change.
The Earth will changed more in the past than it will future .
The Earth will change less in the future than it did in the past .
The Earth will not change.
The changes in the past were caused by natural cause as well as human activity .
The changes in the future will be caused as much by human activity as natural causes.
The changes in the past were caused as much by human activity as by natural causes.
The changes in the future will be caused less by human activity than by natural causes.
Evolution
Climatic Change
When the Dinossaurs Ruled
When Tropical plants thrived.
hotter 100 million years ago than it is today.
less hot 100 million years ago than it is today
cooler 100 millon years ago than it is today .
as hot 100 million years ago as it is today.
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