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Q: How many years ago were the trees covered up?
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History of oxygen?

Oxygen has came from trees many years ago.


When Millions of years ago most of the land on the earth was covered by?

Millions of years ago most of the land on the eart was covered by?


What kind of vegetation covered most of Europe long ago?

trees


How much of the earth was covered in rainforests 100 years ago?

Well, 50 years ago 14% of the earth was covered in rainforests - all around the equator. But 100 years ago it was not destroyed at all - it probably just completely covered the whole equator!


What are some landplants 400 million years ago?

There were many plants 400 million years ago. Many of them were very large compared to modern plants. There were trees, cactus, and ferns, to name a few.


How many trees are there in Indonesia fifty years ago?

Sorry, I'm not really sure about this. Ta-da!


How many trees were there 400 billion years ago?

Zero. The current best estimate for the age of the universe is 13.75 billion years. The first trees are thought to date from the Carboniferous, approximately 359 - 299 million years ago. As such, 400 billion years ago (roughly 1300 times older than the estimated point when trees first appeared on Earth and approximately 23 times older than the age of the universe) it is VERY unlikely that there were any trees at all.


How long was Britain covered in ice?

about 1000,00 years ago


How many rainforests were there 200 years ago?

Approximately 200 years ago, there were over 7 billion acres of tropical rainforest around the world, which covered about 12 percent of the planet's surface.


What covered Michigan 2000 years ago?

The terrain In MichiganÊ2,000 years ago wasn't much different than present. There were many more forest and wooded areas and these were inhabited by theÊHopewell Indian tribes.


Did trees exist before the ice age?

Trees have existed for about 300 million years in their many forms. The present ice age only started about 2.6 million years ago, so the answer is yes, they did.


How many years ago was 5000 years ago?

5000 years ago