Human activity has negatively affected global warming over the past 100 years and is continuing to do so. With humans continuously transporting themselves from one place to another and burning fossil fuels for energy, they are filling the atmosphere with greenhouse gases. The atmosphere naturally traps heat from the sun and warms the surface of the earth, creating the greenhouse effect. However, this layer is growing too fast and too thick because human activity is changing the quantity of atmospheric gases. Humans must find alternative choices instead of effecting the earth negatively. Human activity has caused an increase in temperature in the last thirty five years. They have also caused ocean acidification and a decrease in land ice in both Antarctica and Greenland since 2002. Humans are constantly adding to this layer and are causing for serious world wide issues.Humans have caused disasters to habitats. According to NASA, there has been an increase in carbon dioxide in the atmosphere from about 300 to 400 parts per million since 1950. As a result, scientists have seen a temperature increase in the last 35 years. NASA quotes, “The planet’s average surface temperature has risen about 2.0 degrees Fahrenheit since the late 19th century, a change driven largely by increased carbon dioxide and other human-made emissions into the atmosphere. Most of the warming occurred in the past 35 years, with 16 of the 17 warmest years on record occurring since 2001.” Human made emissions into the atmosphere have caused for temperatures to rise and effect the climate. PBS News also says that gases and aerosols in the atmosphere due to human activity are redirecting the climate in a different direction. Earth’s temperature increase made 2017 the third warmest year in NOAA’s 138-year climate record, behind 2016 which took place as the warmest and 2015 as the second warmest. Human activity has affected the atmosphere, and that is also resulting in a decrease of ice in Antarctica and Greenland since 2002. NASA says that the earth’s climate reacts to changes in greenhouse gas levels. Greenland has lost between 36 and 60 cubic miles of ice each year between 2002 and 2006, while Antarctica’s ice has decreased by 36 cubic miles within 2002 and 2005. This melting of ice will result in rising sea levels which could devastate coastal communities. Animals in the ocean are not dying because of ice melting, but rather of ocean acidity. NASA states that since the beginning of the Industrial Revolution, the ocean’s acidity has increased by a whopping 30%. This acidity will impact coral reefs and shellfish ability to make shells. Both of these can have a significant impact on the oceanic food chain. While there are scientists that do not believe that human activities have a significant role in global warming, it should be noted that many of those researchers are funded by companies that have an interest in oil, fossil fuels, and automobiles.As humans pollute the atmosphere each and everyday, the United States needs to find an alternative to dispersing emissions into the atmosphere. A solution to this major problem could be the use of alternative fuel sources such as electric transportation and solar power. With the use of alternative energy, the atmosphere would be less polluted and the earth’s habitats would be in a much better condition. Something else that the United States could do to help reduce emissions of carbon dioxide and other gases is to sign the Kyoto Protocol like many other leading countries have done. This would set a restriction amongst the population by the government to reduce the greenhouse gas emissions. There are various different steps forward that the US could take in order to reduce greenhouse gas emissions because the atmosphere is getting ruined.