What modern nation is one of the few remaining examples of oligarchy

How does water pollution affect the environment

What can you learn about precipitation levels in south america from this map? brazil is experiencing a drought.it rains more in higher altitudes.peru received the highest level of rain.venezuela got less than 25 cm of rain. 

Ineed , i need to create a power point in life science here is a picture explaining a little what the topic is about, me with some information for my slides : (