In what ways was mining dangerous? why did people continue to work in mines despite the dangers?

What was a result of the industrial revolution in the united states

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.

Based on the information given and the gauges which process or processes have their alarm light on?