Why do you think self-contained solutions like the life straw and the water purifier that we looked at from the bill gates foundations are more effective for developing areas than building complex sewer and drinking water systems

When air at the surface diverges, airflow above must diverge, regardless of hemisphere converge in the northern hemisphere but diverge in the southern diverge in the southern hemisphere but converge in the northern converge, regardless of hemisphere?

What is the theme of "the story of the fisherman"?

Which season occurs in the northern hemisphere when the sun is at its lowest point in the sky