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What are the percentages of the elements of air?
Maximum constituent is nitrogen, by 78%. Then comes oxygen by 21%. Remaining 1% will be Argon(0.9%), carbondioxide(0.03%), water vapour, hydrogen, ozone, methane, carbon monoxide, neon, helium, krypton and even xenon
What is the fraction of solar radiation?
The answer depends on what the question is about. Some possible valid questions concern the fraction of solar radiation which:falls on the earth (as opposed to going in other directions)is blocked by the earth's magnetic fieldis blocked by the ozone layeris reflected by cloudsis absorbed by the atmosphereis reflected by the surfaceis absorbed by the surfaceis useful to plantsis in wavelengths shorter than ultra violet (UV)is in the UV rangeis in the visible rangeis in the infra red (IR) rangeis in wavelengths longer than IR.There are plenty more. I suggest that you spend just a little bit of time considering your question before posting it.
