The U.S. rejoins the Paris Climate Agreement

Last Updated 5 months ago by Devontae Jackson.

Heads of delegations pose for a group portrait at the 2015 United Nations Climate Change Conference (COP21), which led to the signing of the Paris Agreement. Le Bourget, France, November 30, 2015. Image courtesy of the NRDC.

After leaving the Paris Climate Agreement, an executive order was signed to rejoin the Paris Climate Agreement tonight. The agreement is signed by nearly 200 countries committed to cutting emissions and lowering greenhouse gasses. At the original signing, the U.S. gave 3 billion dollars to help economically developing countries with cutting emissions and lowering greenhouse gasses. As economically developing countries are some the countries most at risk from climate change.

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The executive order will be sent to the UN and reestablish the U.S. in global talks in the Paris Climate Agreement in 30 days.

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CO2 is up to 415 parts per million which is very high. Temperatures are 2.0 F higher globally since 1880, above is a look at thermostat readings (red line) and proxy data readings (black line) for temperatures. Proxy data comes from things like ice cores and tree rings that help tell a story of how temperature has changed over the years.

Above is a look at the ice mass variations of Antarctica and Greenland. NASA says ice masses are decreasing at 428 billion metric tons a year while sea level is increasing 3.3 millimeters a year.

What is the difference between weather and climate? Weather is what happens on a daily basis while climate is what happens over a longer period of time like months and years.

A lot of factors goes into climate change like longwave radiation, albedo, tree usage, land usage, the amount of different greenhouse gasses in the atmosphere, etc. It is important to note that some greenhouse gasses are essential for life on this planet but too much is bad.

Now, early research has suggested that everyday weather itself may not be affected by climate change but certain weather events like hurricanes, typhoons, monsoon seasons, and severe weather may be getting indirectly enhanced/stronger from climate change.

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