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

You are a scientist who has been sent on a special mission to study plants and animals in south asia! your destination is an important forest in eastern india. you need to travel to 17°n latitude and 83°e longitude. which star should you travel to?

In the diagram below dab and dac are adjacent angles

What factors influenced brazil's current and future economic strength?