Why is ozone in the lower atmosphere considered a negative, while it’s role in the upper atmosphere is positive ?

Which ofbthe following is a characteristic shared by both brazil and mexico

The formation of the planet uranus is estimated to have occurred approximately when?

What is the difference between the cultures of central asia and the caucasus region? the majority of people in central asia are muslim; the majority in the caucasus region are christian. the primary language in central asia is armenian; the primary language in the caucasus region is russian. central asia has been plagued by ethnic unrest; the caucasus region has had little ethnic conflict. the effects of soviet rule can still be seen in central asia; the caucasus region has developed its own identity since the fall of the ussr.