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Global Warming and Climate Change: What Do We Really Know?
by Larry Carley copyright 2019 AA1Car.com
Is it true or not? What do we really know about Global Warming and Climate Change?
People who deny Climate Change is real say it is a scam hyped by environmentalists and clean energy proponents who want to tax petroleum out of existence. On the opposite side of the issue are those who say the sky is falling and we have to act now before it is too late. Unfortunately, politics and conspiracy theories have gotten in the way of factual science.
Twelve Things We Know (Real Facts) About Global Warming and Climate Change:
- The Earth's climate has been changing since day one. So yes, climate change is real and ongoing. The gases in our atmosphere and the climate conditions that result are NOT stable and are constantly changing over time. Many factors play into this including solar activity, volcanic activity, shifts in ocean currents and atmospheric currents, photosynthesis (plants converting atmospheric CO2 into Oxygen), chemical reactivity (atmospheric CO2 and oxygen reacting with various elements, minerals and sea water) and human activity (burning fossil fuels for energy and transportation, clearing rain forests and industrial activity).
- The Earth's climate has undergone long cyclic periods of hot and cold (mostly cold) over eons of time. These Ice Age cycles in more recent geologic history have typically lasted about 100,000 years, with mini-Ice Ages and warming cycles within each larger cycle.
- The most recent mini-Ice Age that took place in the Northern Hemisphere started about 20,000 years ago, and ended about 11,000 years ago. So for much of recorded human history, we have enjoyed an unusually warm period that has been favorable to agriculture and the growth of our human civilization. That's the good news. The bad news is we don't know how long it will last, whether it will get hotter or colder, and what impact climate change will have on our lives.
- Although most of the warming-cooling cycles throughout geologic history (that goes back hundreds of millions of years) have occurred over very long periods of times (tens of thousands of years), some mini-Ice Ages have occurred rather suddenly.
- The last mini-Ice Age to hit Europe and North America 20,000 years ago happened over a period of only 10 to 20 years! The drastic climate changes it produced caused many plants and animals to go extinct, and forced many humans to migrate to warmer areas to survive.
- During that last mini-Ice Age, a glacier estimated to be 3,000 feet thick covered much of North America and the area where Chicago is now. That would be a covering of ice and snow more than twice the height of the tallest skyscrapers in Chicago. Image the effect if that happened today!
- CO2 is a global warming gas because it causes the atmosphere to retain heat. The concentration of CO2 in recent years has not only been rising but also accelerating at an alarming rate. In 2012, it exceeded 400 parts per million (ppm) for the first time in recorded history. In 2019, it has exceeded 440 ppm. The last time it was that high was 3 to 5 million years ago! During the Age of the Dinosaurs 150 to 200 million years ago, scientists say the atmospheric concentration of CO2 was about 5 times higher than today. But the planet also had a much warmer and wetter climate then.
- In the 1,000 years that preceded the Industrial Revolution of the 18th century, atmospheric carbon dioxide held steady at around 270 to 280 parts per million. As coal powered the growth of industrialization and transportation, CO2 levels began to creep up about 1 ppm per year. It continued to increase at that rate until the 1970s when it began to increase at an even faster rate, which scientists attribute to the exponential growth of the human population, energy consumption, industrialization, deforestation and vehicle usage. There has been no increase in volcanic activity or other natural sources of CO2 that would account for such a rapid rise in CO2 in the atmosphere.
- The world population is currently around 7.7 BILLION people. The world population at the start of the Industrial Revolution in 1800 was only 1 billion, a number that took humanity 10,000 years to achieve. By 1930, the world population doubled to two billion, then three billion by 1960, then four billion by 1974, and five billion by 1987. Such an exponential growth rate is unsustainable. All of these people are leaving a HUGE carbon footprint on the planet.
- As the world has industrialized, more and more people who used to live in rural areas have moved to cities seeking jobs and opportunity. And as their standard of living has risen, they have been buying cars like crazy. Twenty years ago everybody in China rode bicycles. Today, China is the world's biggest market for auto sales, exceeding the U.S. and Europe. As a result of all this growth, the world vehicle population is now over ONE BILLION cars and trucks, and 99.6 percent of them burn gasoline or diesel fuel. As of 2018, there are only about 4 million electric vehicles worldwide . In the U.S., transportation accounts for about 28 percent of total CO2 emissions, while power generation also accounts for 28 percent.
- Coal-fired power plants continue to be a major source of man-made CO2. China has nearly 2,400 coal-fired power plants with more than 1,000 new plants planned for construction in the years ahead. India is next on the list with almost 600 coal-fired power plants, followed by Europe with 470. Currently, there are about 360 coal-fired power plants in the U.S. However, since 2010 nearly a third of these coal-fired plants have been shut down or converted to less expensive and cleaner burning natural gas (which produces only about one-fifth as much CO2 as coal when it is burned). The rapid growth of wind and solar power has also reduced the demand for coal.
- Political agreements have been made to address the issue, but not everyone is onboard and some are reversing direction. The Paris Agreement of 2015 created a voluntary plan of action for governments around the world to reduce their use of fossil fuels to reduce CO2 emissions. The goal of the agreement was to keep global warming caused by man-made CO2 to less than 2 degrees C (about 4 degrees F) in the near future, with the eventual goal of stopping and stabilizing temperature increases. Although 197 nations signed the agreement (including the U.S. and China that together account for 40 percent of all global emissions), some including Russia, Turkey and Iran have not formally adopted the plan. Also, in 2018 President Trump decided to withdraw the U.S. from the agreement citing the need for continued energy growth. Most saw the move as a political favor to his supporters in the fossil fuel industry.
So what conclusions can be made from this information?
It's obvious that human activity over the past 200 years, and especially the most recent 20 years has had and will continue to have a major impact on CO2 emissions, Global Warming and Climate Change.
Scientists have documented an increase in average global temperatures of around 1.5 degrees F per year over the past five years. This is a significant trend that is already having serious consequences.
More heat in the atmosphere means more energy and moisture in the atmosphere. This, in turn, means much more rain for some areas (those once in 500 year floods are now happening every few years!), more drought in other areas, more forest fires in the western U.S., and more (and stronger) tornadoes and hurricanes causing more deaths, injuries, destruction and financial loss from climate-related disasters. More heat in the atmosphere also means more melting of polar ice caps and a corresponding rise in worldwide sea levels. Glaciers have been melting and shrinking at an accelerating rate, with some disappearing entirely. Maybe you should rethink buying that beach front property in Florida because half the state may be underwater in the not too distant future!
IF anything can be done to mitigate Global Warming and Climate Change (and I'm not sure we can considering the number of people and vehicles on our planet, our dependence on fossil fuels, and the money and politics behind the fossil fuel industry) , we had better be doing it sooner rather than later.
Some say we may have already passed the tipping point and that anything we do individually or collectively going forward will be too little too late. I hope this is not true because I want my grandchildren and great grandchildren (and myself) to continue living in a world that is hospitable to human existence and civilization.
Reducing our reliance on coal-fired power plants by converting them to cleaner burning natural gas, or replacing them with wind, solar and yes nuclear power generation can reduce global CO2 emissions. Nuclear has its own drawbacks and risks, but it terms of CO2 it is a clean energy source.
Electric vehicles that get their power from clean or relatively clean sources is another step we can take to reduce CO2 emissions. Electric car battery technology has come a long way in recent years and continues to improve. Some of today's electric cars can drive over 300 miles on a single charge, and others are coming that will go much further than that. Electric car sales are also increasing, with over a million sold worldwide last year. More electric cars are now being sold in China than any other country. But until there is a significant shift away from the internal combustion engine to battery or fuel cell powered transportation, those one billion plus vehicles that are on the road now will continue to be a major source of CO2.
Stopping the destruction of tropical rain forests, smarter land use policies, reducing urban sprawl, making homes and buildings more energy efficient, changing vehicle usage patterns to increase public transportation options and vehicle ride sharing are additional changes that are being made to reduce our carbon footprint and CO2 emissions. Family planning to slow population growth is also essential.
Finally, how about less hot air and B.S. from politicians who don't know what they are talking about? That would be a huge help!
Additional Food for Thought Regarding Global Warming
The Earth's atmosphere is about 78 percent nitrogen, 21 percent oxygen and the rest is trace gases including argon, methane, nitrogen oxide and carbon dioxide (only 0.04 percent). The current average year-round temperature for our planet, according to NASA data, is 58.3 degrees F (which is up from 57 to 57.5 degrees from the 1940s through 1970s).
Because CO2 traps and holds heat, the more CO2 in the atmosphere, the more heat is retained and the higher the average temperature of the planet.
The planet Venus, which is almost the same size as Earth but is closer to the Sun, has an atmophere that is 96 percent carbon dioxide. This has created a runaway greenhouse effect that has raised the average temperature on Venus to 846 degrees F, hot enough to melt lead!
Methane Is An Even Greater Threat to Global Warming
Methane is an even greater threat to Global Warming because it traps and holds heat 21 times as much heat as carbon dioxide. Methane (natural gas) is a byproduct of oil drilling and production, organic material breaking down in landfills, and natural gas emissions from rice paddies, animal manure, cow farts, peat bogs, swamps, lakes and thawing permafrost. Although methane accounts for nearly 10 percent of all global greenhouse gases, it has been increasing, from 700 parts per billion (ppb) in 1750 to 1,818 ppb in 2011. To make things worse, methane can persist in the atmosphere for up to 100 years or more.
Click Here for more information from the EPA about greenhouse gases.
Jet Vapor Trails Are Also Warming The Planet
Jet aircraft contrails are also playing a role in Global Warming. When combustion byproducts (water vapor and CO2) exit a jet engine and hit the cold upper atmosphere, the water vapor condenses and forms a vapor trail cloud. The vapor trails produced by commericial jet traffic can trap enough heat to cause a localized increase in temperature. After the 9/11 terrorist attacks on the Twin Towers in New York City, all air traffic was temporarily grounded while officials sorted things out. Meterologists noted a drop in temperature during this period in areas near major air hubs due to the lack of vapor trails in the sky.
Click Here to read about what happened when jet traffic was temporarily grounded following 9/11.
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