No, it is not true.
29 to 30% of rivers on Earth WHAT?
Yes this is true.
It is true 90 percent of water covers the earth.
No, the number is more like 90%.
yes
This statement might actually be true. 25% of the Earth's land surface outside of the polar regions are desert.
True in spades!
Yes, deserts cover about 33 to 35 percent of the earth's land area.
Nine tenths of the earth would mean ninety percent of the earth. Used in a phrase one could say: Nine tenths of the earth has some form of life on it. [though I doubt that fact is true.]
No, humans do not use or consume 60 percent of the oxygen on Earth. The atmosphere is made up of about 21% oxygen, and human respiration accounts for only a small fraction of that.
This is true.
Yes