One of the greatest challenges our planet is facing is global warming, also known as climate change. Climate change is an increase in the earth's atmospheric and oceanic temperatures. (Justin Gillis, “Carbon Dioxide Level Passes Long-Feared Milestone,”). Global warming has been a subject that widely debated among politicians and scientists. Scientists believe that global warming is also caused by man-made such as pollutions from human activity.
Although the issue did not start to gain national attention until the early 2000s, scientists have been studying atmospheric gases and the effect that human consumption of fossil fuels has on the atmosphere and climate since the early nineteenth century (Rich). The overwhelming consensus among scientists today is that the climate is changing drastically and humans are causing it through specific, preventable actions (Rich). Global warming is caused by an increase in greenhouse gases, which, under normal conditions, it (the greenhouse effect) is what makes life sustainable by keeping the earth within a constant range of temperatures (Gore). About 30 percent of the light and the heat of the sun is reflected back into space, either by clouds, or by the earth’s surface (especially ice, which is particularly reflective.) About 20 percent of the light and heat from the sun is
Also, an engineer Guy Callender creates a theory that larger amounts of carbon dioxide in the atmosphere are causing global warming with the rising global temperatures occurring around the same time, however, meteorologists did not believe him at the time and the dismissal of Callender's theory emphasizes the start of the controversy of the causes of global warming (A brief history of climate change, 2013). During the 1960’s, scientists discover that the effects of global warming over time will cause sea levels to rise from Antarctica's ice sheets melting (The discovery of Global Warming, 2017). Awareness had finally begun over global warming at the beginning of the 1970’s with Earth Day being celebrated for the first time (The discovery of Global Warming, 2017). Last, studies of global warming explain about how much damage in terms of global GDP would be caused by this issue first suggesting that global warming will have an effect financially as well as the environment. Overall, this international issue has been studied since the early nineteenth century, created major impacts over time, has changed the Earth’s environment, and economies
Ever since the early 1980’s, the earth’s surface has increased by about 0.8 degrees. Scientists are 90% certain that global warming is caused by human activities that increase the levels of greenhouse gases. A greenhouse gas is a gas in the atmosphere that absorbs and emits radiation within the thermal infrared range. Water vapor, carbon dioxide, and ozone are all greenhouse gases that regulate the earths temperature. Without them, the earth would nearly average only 33 degrees celsius.
Polar bears may disappear as the sea ice continues to melt. Thus, scientists intend to figure out why the global temperatures have risen, but that thus far they have not found the solution for global warming. A few scientists think global warming is natural; however, the majority of plentiful scientists think global warming is manmade because of emissions from transportation, air conditioning and
Man-made climate change happens because we emit greenhouse gases into the Earth`s atmosphere. These gases trap or absorb the infrared radiation from the Sun. Emision of the gases have different sources, including factory fields, power plants, agriculture
Common sense dictates that something very bad is happening, and that something is called global warming. Over the years I have read countless articles on global warming and have encountered a few that claim global warming is completely false, or better yet that it is a conspiracy that is designed to charge people more for goods and services. Unfortunately in this writer’s opinion, this is completely ludicrous as there is so much evidence to the contrary proving that global warming is changing the planet. When checking on the computer for peer-reviewed articles on Global Warming, what was found was very positive. From the year 1991-2012, there have been 13,950 articles on global warming and of these only 24 reject global warming.
Over time, the amount of energy sent from the sun to the Earth’s surface should be about the same as the amount of energy radiated back into space, leaving the temperature of the Earth’s surface roughly constant. So this heat that is formed in these gases merely sits there and radiates more heat than it should. Today, major changes are taking place. People are conducting an inadvertent global experiment by changing the face of the entire planet. They are destroying the ozone layer, which allows life to exist on the Earth's surface.
Clearly life and climate interact with each other (McCaffrey). If life had never appeared on the earth’s surface, the local climates would have been different from those which have prevailed. And if climate had everywhere been unchanging throughout geologic time, the varied life we know- the millions of species- might not have come about. These are just a few of the many headlines that crossed the wires in last few years: “Europe’s summers to get hotter,” “The Arctic’s ominous thaw,” “Study shows warming trend in Alaskan Streams,” “Global Warming Seen as Security Threat,” “Global warming a bigger threat to poor,” “Tibet’s glacier’s heading for meltdown,” “USA: Climate change is costing millions.” Global warming has achieved the status of a major threat. It inspires nightmares of a troubled future and propels apocalyptic drams such as the summer 2004 movie “The Day After Tomorrow.” The twentieth century was the warmest of the past 1000 years and 19 of the 20 hottest years on record occurred after 1980 (Climate Change Facts).
But how big of an impact do humans really pose? Is Earth just on a cycle of events that is in no way correlated to mankind? Many changes in the last century are beginning to make people wonder just how we are affecting the Earth; and are these changes going to make us better off, or hinder us in the future? Greenhouse Gas Emissions The most notable change is the increase in greenhouse gases. Greenhouse gases are mostly comprised of carbon dioxide and methane.