D. 173,000 terawatts
- Solar energy is radiant light and heat from the Sun that is harnessed using a range of technologies.
- The Earth receives ≈174 petawatts (PW) of incoming solar radiation (insolation) at the upper atmosphere
- Approximately 30% is reflected back to space while the rest is absorbed by clouds, oceans and land masses.
- The spectrum of solar light at the Earth's surface is mostly spread across the visible and near-infrared ranges with a small part in the near-ultraviolet.
Since, 1PW=1000TW
Thus, 174 PW= 174*1000=174,000 TW.
Therefore, correct option is D.
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