Hourly Forecast Detailed. 1  0am:The Santee, SC forecast for Apr 11 is 63 degrees and Clear. There is 74 percentage chance of rain and 4 mph winds from the South-Southeast. 2  3am:The Santee, SC forecast for Apr 11 is 55 degrees and Clear. There is 79 percentage chance of rain and 4 mph winds from the South.
Most Important Organism? Marine plants produce between 70 and 80 percent of the oxygen in the atmosphere.
What percentage of carbon dioxide do we exhale? A: About 4 percent of exhaled air is carbon dioxide, and 16 percent is oxygen. The majority of exhaled air â approximately 79 percent â is nitrogen. Carbon di... Full Answer >