Volcanoes release a hazy smoke called . Steven Businger helped develop a that predicts how this smoke spreads. To model the smoke conditions, scientists measure the amount of gas a volcano is spewing.

the author is showing that it is the insatisfaction of basic needs that brings about the protests such as the strikes.if workers do not earn enough to buy food and feed their families and themselves in order to continue working, what is the use of working? besides, another message from the author is that of the owners of factories should be worried about ensuring their furure by having a second and third generation of workers in their industries.if they do not hear the workers demands, they will not have any more workers to make their pockets full.

? ? what can you explain this to me i am so confused

now you can make him brainleist.              

i think   they were arguing over whether they would get info from doing it or nit was invading privacy