uoduttIull t8 Genéral Chemistry (A01) (4 cr) Jamal Gradebook | Email | Doc Shari
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uoduttIull t8 Genéral Chemistry (A01) (4 cr) Jamal Gradebook | Email | Doc Sharing | Dropbox | webliography | Tech Support | there had to be vegetation at one point. The Earth has been go Maddison Haan Climate Change Discussion 6/25/2017 1:47:56 PM Now more than ever we can see the effects of global warming. On the news today there was a story about the temperatures reaching so high that it is melting plastic products, such as recydling bins, mailbox posts, and fences. The sea levels as well as temperatures are rising at a rate now faster than ever before. According to the NASA website, the amount of carbon dioxide in the atmosphere had never been above 300 parts per million until the 1900s, and reaching above the 400 parts per million mark today. While there have always been recorded periods of the Earth's average temperatures being higher and lower, causing Ice Ages and major droughts, it seems to me as though it will not improve into a cyde of Ice Age again, as we have pushed the planet too far. The carbon dioxide causes the heat to be trapped in Earth's atmosphere, therefore the rising amount of CO2 in the atmosphere will prevent the Earth fron cooling once again. Reply Show Less 6/25/2017 9:16:53 PM Elle Kloewer Climate Change It is inevitable that the larger our population gets the more likely global warming with continue to harshly affect our environment. Scientific studies show that cars take to top position to emitting the most greenhouse gases; although we are making advancements in car production to go green. Research says that global warming has been prominent since the 1950s. The influences we make on climate change must change because dlimate change could be a killer to more and more natural systems or lives. Show Less Reply 6/26/2017 7:24:01 PM Mamdouh Taweel reply to Elle Kloewer RE: Climate ChangeExplanation / Answer
Scientists know that certain gases trap heat and act like a blanket to warm the planet. One of the most important is carbon dioxide (CO2), which we release into the atmosphere when we burn fossil fuels — oil, coal, and natural gas — to generate electricity, power our vehicles, and heat our homes.
As we overload our atmosphere with carbon dioxide, more and more heat is trapped — and Earth steadily warms up in response. How do we know? The scientific evidence is overwhelming.
Scientists know that certain gases trap heat and act like a blanket to warm the planet. One of the most important is carbon dioxide (CO2), which we release into the atmosphere when we burn fossil fuels — oil, coal, and natural gas — to generate electricity, power our vehicles, and heat our homes.
As we overload our atmosphere with carbon dioxide, more and more heat is trapped — and Earth steadily warms up in response. How do we know? The scientific evidence is overwhelming.
Trends in temperature readings from around the world show that global warming is taking place.
Every one of the past 40 years has been warmer than the 20th century average. 2016 was the hottest year on record. The 12 warmest years on record have all occurred since 1998.
Over the past 130 years, the global average temperature has increased 1.5 degrees Fahrenheit, with more than half of that increase occurring over only the past 35 years. The pattern is unmistakable: Every one of the past 40 years has been warmer than the 20th century average. 2016 was the hottest year on record. The 12 warmest years on record have all occurred since 1998.
The science is clear. Global warming is happening.
We are the primary cause.
Scientists know that certain gases trap heat and act like a blanket to warm the planet. One of the most important is carbon dioxide (CO2), which we release into the atmosphere when we burn fossil fuels — oil, coal, and natural gas — to generate electricity, power our vehicles, and heat our homes.
As we overload our atmosphere with carbon dioxide, more and more heat is trapped — and Earth steadily warms up in response. How do we know? The scientific evidence is overwhelming.
The planet's temperature is rising
Trends in temperature readings from around the world show that global warming is taking place.
Every one of the past 40 years has been warmer than the 20th century average. 2016 was the hottest year on record. The 12 warmest years on record have all occurred since 1998.
Over the past 130 years, the global average temperature has increased 1.5 degrees Fahrenheit, with more than half of that increase occurring over only the past 35 years. The pattern is unmistakable: Every one of the past 40 years has been warmer than the 20th century average. 2016 was the hottest year on record. The 12 warmest years on record have all occurred since 1998.
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The Planet's Temperature Is Rising
Carbon dioxide levels are increasing in the Atmosphere. Detailed measurements of atmospheric carbon dioxide (CO2) levels have been taken continuously for more than 50 years. The data show that CO2 levels have steadily increased every year. Today they are 25 percent higher than in 1957.
What's more, scientists have detailed records of past CO2 levels from ice core studies, which show that CO2 levels are higher today than at any point since our distant ancestors began migrating out of Africa 800,000 years ago.
CO2 absorbs heat reflected from the Earth’s surface — heat that would otherwise pass freely into space. The CO2 then releases that heat, warming the Earth’s atmosphere.
As CO2 levels increase, the pace of warming accelerates. Satellite measurements confirm that less heat is escaping the atmosphere today than 40 years ago. Though other heat-trapping gases also play a role, CO2 is the primary contributor to global warming.
The climate has changed many times in the geologic past due to natural causes — including volcanic activity, changes in the sun’s intensity, fluctuations in Earth's orbit, and other factors — but none of these can account for the current rise in global temperatures.Scientists can conclusively identify that human activity is responsible for the observed increase in CO2. How? The carbon dioxide emitted by burning coal, natural gas, and oil has a unique chemical “fingerprint" — and the additional CO2in the atmosphere bears that signature.Scientific societies and scientists have released numerous statements and studies showing the overwhelming consensus that global warming is happening and that human activity is the primary cause.Global warming has serious implications for our health, environment, and economy. Dangerous heat waves are increasing in severity and frequency. Sea level rise is accelerating. Extreme storms are on the rise in some areas. More severe droughts are occurring in others. Collectively, these effects pose a threat to the entire planet — including you, your community, and your familyProduced on a regular basis by the U.S. Global Change Research Program, the National Climate Assessment provides a comprehensive assessment of the current understanding of climate change science, including an overview of likely impacts in the United States on a region-by-region basis.Intergovernmental Panel on Climate Change (IPCC) was established in 1988 by the World Meteorological Organization and the United Nations Environment Programme. Through the IPCC, climate experts from around the world synthesize the most recent climate science findings every five to seven years and present their report to the world’s political leaders. The IPCC's Fourth Assessment was released in 2007. The most recent Fifth Assessment was released as a series of working group reports beginning in fall 2013Scientists use certain terms to describe how well something is known, which can lead to confusion about important scientific findings on global warming. Knowing this terminology is key to understanding what is known about climate change.We can reduce global warming emissions and ensure communities have the resources they need to withstand the effects of climate change—but not without you. Your generous support helps develop science-based solutions for a healthy, safe, and sustainable future.
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