Dust from the Sahara desert across the Atlantic basin to a mail to creep in quantity enough to substitute for phosphorus in Earth substance in the area that is going to wash with water, rain and flooding.
Dust from the Sahara across the Atlantic Ocean to the Amazon Basin in quantities large enough to replace the phosphorus in the soil in the area, which was washed away with rain and flooding.
Dust from the Sahara across the Atlantic to the Amazon basin in quantities large enough to replace the phosphorous in soil in the area, which was washed with rain and flood.