The tropical wet-and-dry climate is influenced mainly by the

It is influenced by the ITCZ and subtropical highs. The ITCZ is the intertropical convergence zone. This is a belt of lower pressure. It circles the Earth by the equator near the area that the trades winds of the northern and southern hemisphere come together. Subtropical highs is a belt of high pressure atmosphere around the latitudes of 30 degrees north in the northern hemisphere and 30 degrees south in the southern hemisphere.

He should put sand around the spill in order to contain it so that it won't spread