Answer: A. Air bubbles trapped in a layer indicate how much CO2 was in the atmosphere the year the layer formed.
Explanation:
When ice cores were formed, they included air bubbles that got stuck during the formation. Scientists can study these air bubbles to find out how much carbon dioxide is in them as this will show the proportion of carbon dioxide in air at the time the core was formed.
They can then compare those figures to current carbon dioxide levels to see if there has been a change. This change will give proof of climate change.
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The regions of the sun's interior from the core outward is from the <span>core, convection, and radiation.
</span>The inner layers<span> are the Core, Radiative Zone and Convection Zone. The outer </span>layers<span> are the Photosphere, the Chromosphere, the Transition Region and the Corona.
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Groundwater is important for us as it is the greatest source for freshwater, crop irrigation and agricultural activities.
In general, groundwater is present in reservoirs and aquifers below the surface of the earth and also most crucial natural source of water for any nation. Groundwater provides fresh drinking water to almost 50% of global population. With an ever increase in global population, the use of groundwater is also increasing.
The primary way of wasting fresh water is its overuse in households such as in kitchen, toilets for taking long showers, washing and bathing purposes.
We can save groundwater by avoiding unnecessary leakage, unnecessary showers, and decreasing shower time.
If you need to learn more about groundwater click here:
brainly.com/question/9617
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