There are many challenges facing the global economy. Certain events will put the global economy at risk. Man-made financial events such as increasing interest rates can impact the global economy for better or worse, depending on the timing and speed of the rate increases.
Other man-made events can put the global economy at risk, such as threats of nuclear war or policitical instability in a major economic player like the United States, Great Britain, or China. Natural disasters can also have an impact on the global economy. Political upheavals and wars will impact the global economy not only because a country's own economy will suffer but also because trade relations are often impacted.