Which climate change treaty committed the countries that signed and ratified it to reducing carbon dioxide emissions below 1990 levels?

The blue segment below is a diameter of oo. what is the length of the radius of the circle?

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. 

When the land and the see warm up at different rates during the day, what is generally the result? -a snow -b rain -c a breeze -d warm temperature