Octopuses, Costa Rica, CO2, and some other junk. Posted on April 17, 2009 by sorellaaglio Octopuses are poisonous! Costa Rica is cleaner than the US. Carbon dioxide and five other heat-trapping gases are pollutants that threaten public health and welfare. (duh.) You can make your own yogurt. It doesn’t even look that hard. Education in the US needs some dollars.