Explain how the urban explosion contributes to the growth of the informal economy in developing countries. What is the role of the informal economy in cities of the developing world. Does it still play an important role in cities of the developed world, such as the US?

In a 2010 article “fact check: eastern u.s. earthquake risk” by chris mould, the author provides as evidence the following statement by the united states geological survey: “although earthquakes may be less frequent in the eastern u.s., … urban areas in the east could face bigger losses because the shaking would affect much larger areas than similar quakes in the west. in addition, most homes and buildings in the east are not designed to withstand earthquakes.”this statement directly relates to which of the following concepts? a. vulnerabilityb. hazardc. riskd. severity

What is the approximate chemical composition of the solar nebula?

Are divergent boundaries responsible for tsunamis?