Temperature trends have a huge role when it comes down to this topic. Over the past 650,000 years there has been evidence of seven cycles of glacial advance and retreat going on on our planet with the last ice age era ending about 700,000 ago starting human civilization and modern climate era. (Climate Change, 2017). It’s realized today that there are a lot of problems already happening due to the temperature increasing and it starting to get worse as it’s more recognizable. Water levels are rising and there is also a change in precipitation and other local climate conditions (Climate Change, 2017). This temperature tracking began in the late 19th century as people in the 1930’s started to find out that there had been a pronounced warming trend surfacing the earth. Then reaching into the 1960’s, weather experts found out that warming trend shifted into a cooling trend for the past couple of decades. What really caused scientists to really believe that natural cycles were occurring on earth to create these climate changes were in the 1970’s when most scientists found out that this situation was starting to become extremely serious and developed lots of possibilities. Climate change got even more serious going into the 21st century as scientists recognized that a profound change occured in the climate system which were evidential in things like ship logs, ice caps and tree wigs. Going back to the 1930’s to 1950’s, as said before that people mainly in the eastern North America and western Europe started realizing that the temperature was starting to change and that’s also when the press started calling attention to numerous anecdotes of above normal temperatures. The main concentration was that it was getting colder and the snow was getting deeper. As scientists started researching the situation, heading into the 1940’s there were concerns that the temperature was getting warmer except in the north Atlantic regions where temperatures were starting to become warmer.