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Since the beginning of the Cambrian period, O2 levels have fluctuated between 15% and 30% of atmospheric volume. Towards the end of the Carboniferous period (about 300 million years ago) atmospheric O2 levels reached a maximum of 35% by volume, which may have contributed to the large size of insects and amphibians at this time.Whilst human activities, such as the burning of fossil fuels, have an impact on relative carbon dioxide concentrations, their impact on oxygen levels is less significant.
What else can I help you with?
How much oxygen do pine trees produce?
Pine trees produce approximately 260 pounds of oxygen per year.
When was The Epoch Times created?
The Epoch Times was created in 2000.
What element for the chiense zodaic in 2000?
The Chinese zodiac element for the year 2000 is Metal. In Chinese astrology, each year is not only associated with an animal sign but also with one of the five elements: Wood, Fire, Earth, Metal, and Water. 2000 was the Year of the Dragon and the Dragon is associated with the element Metal.
What ddate was oxygen discovered?
Joseph Priestley discovered oxygen in 1774.
What is earths motion in relation to a year?
The Earth's motion around the Sun is what determines a year. This motion is known as revolution, taking approximately 365.25 days to complete one orbit, which is why we have a leap year every 4 years to account for the extra quarter of a day.
What Tina's salary was 20350 last year This year she is getting paid 2000 more What was the percent increase to the nearest percent?
Tina's pay increase was 9.828% (10% to nearest percent).
What is 5 of 2000 on a 10-year CD from honor credit union?
5 percent of 2000 on a 10-year CD from honor credit union is 100.
At what rate did the GNP of the Philippines grow from the year 2000 to 2001?
The Philippine GNP grew by 2.25 percent from 2000 to 2001.
How much interest would you receive for 2000 at 1 percent interest rate for 1 year?
1 percent of 2,000 is 20 .
How much percent does the oceans produce worlds oxygen?
Current thinking places it at between 50 to 85 percent, depending on time of year and the state of phytoplankton bloom.
What is the lenghth of earths year?
the length of earths year is 365 days, tho its not really hahaha
If electricity cost 18000 one year and jumped to 20000 the next year what was the percent increase?
2000/18000 x 100 = 11.1%
What is the literacy rate of India in 2000?
what is the literacy rate of India as per 2000 census
What should I do if my 4 year old boy's oxygen level is 89 percent?
Oxygen levels should be 98% or higher. Find professional help at a hospital. Right now!
Dodge Ram 1500 year 2000 Location of oxygen sensor?
There is one on each side of the catalytic converter.
How earths distance from the sun change throughout the year?
how does earths distance from the sun change throughout the year
Where is the oxygen sensor located on a 2000 Infinity QX4?
Oxygen sensors are located in exhaust manifolds or in exhaust pipes before and after the converters in most cars depending on the year of the vehicle
