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Finally a post title that doesn’t need translation and everybody can understand: 350. 
We live in a culture where numbers are important, and 350 is the most important one today. 350 is the number that leading scientists say is the safe upper limit for carbon dioxide—measured in "Parts Per Million" (ppm) in our atmosphere. And guess what? We already passed that number! 
Arctic warming and other early climate impacts lead to our current 390ppm, and we need to rapidly return to 350ppm this century, before we risk reaching tipping points and irreversible impacts on our planet.
For all of human history until about 200 years ago, our atmosphere contained 275 parts per million of carbon dioxide.  275 ppm CO2 is a right amount to make our planet warm enough for humans to inhabit. But beginning in the 18th century, humans began to burn coal and gas and oil to produce energy and goods. The amount of carbon in the atmosphere began to rise slowly and now we are way over what is consider safe.

350 Ethiopia 
350 is more than a number–it’s a symbol of where we need to head as a planet and we need to move quickly, and we need to act together. In order to unite the public, media, and political leaders behind the 350 goal, October 24, 2009 has been declared International Day of Climate Action .

350 Ethiopia 

If you want to participate, look for local events in your country, city, town, or propose your own.
All nations are affected by this rising of carbon dioxide in the atmosphere, but poor nations like Ethiopia are the ones who are suffering it the most.
20.000 children marched in Ethiopia for 350, lets follow them:

For more information, please go to http://www.350.org