The "dust bowl" was an environmental situation associated with what event?

Give reason why some traditional caribbean customs are presently changing

In a market economy, what does a producer mean when it asks, "is there a market for my products? is there a place where we can sell our products? " "ls our product being made more cheaply overseas? " will consumers need and want to buy our products? " will the government support demand for our products? "

Who gave the famous "i have a dream" speech at the march on washington?