Size of GDP

Atmospheric Carbon Dioxide from Mauna Loa, Hawaii from IPY III (1957-58) to IPY IV (2007-2009)

Also known as the "Keeling Curve"

You might not know this (most people don’t,) but 2007-2008 is an International Polar Year (IPY). More than 60 countries, including the U.S., have developed large-scale polar research projects that rely heavily on international coordination and collaboration.

the red bar on maps represent the amount of number of water stations developing

here are the legends:

Left Column:

Risk index of floods in cities

numbers...

flowing boundaries

Right Column:

Flood Frequency in times/year

Rivers

California Renewables Mix

California Energy Mix