we have been discussing some factor that influence the global climate. Today we will go to talk about factor that you might find surprising. Surprising because it’s so small that you probably wouldn’t expect to be important. That factor is dust by dust we mean not just tiny pieces of dirt, but any small particles like *, salt, bacteria or fungal spots. There are several different methods to collect date on dust. One method is flying in the storm with air creff equipped with dust collection devices. We can then analyze the dust samples to find out what types of dust present at given time of a year, or a certain location and height in atmosphere. Why would you want to map out how the types of amount of dust vary under different circumstances? Because different types of dust behave differently and affect the whether in different ways., Some types of dust have rain to form.
now many people living near the mediterranean sea in ancient times had extensive shipping networks. Two of the most prominent were the MO and MY. The Mo lived on an island of quit. They did extensive trade by sea. Trading form products and highly prices brown objects they made, things like weapons and tools. They established the trading network or trading colonies through out the east MY. And this became great commercial centers. These commercial centers produced really wealthy for them. And mo used this wealth to build great powers and aqueducts, and improve their harbor on quit. The mo civilization reached its peak in the 1600 BC. But they gradually lose their dominant position to the MY, who were from the mainland of Grace where Mo was created. The My actually learned a lot about sea trade and commence from the MO. But this mental relationship changed after a volcano erupted on the island of philla in 1450 BC. Because * was so close to create, the volcanoes apparently caused earthquake that ships and destroyed important parts of quit. After that the MY became the dominant seatrade in the area. Now we knew that natural disaster might be largely responsible for the decline of MO seatrade. But reasons for the decline of MY seatrade are more controversial. The key factor may have been political unrest both intently among the MY and in countries they traded with, which disrupted trade networks.