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The text confirms the changes there has been in the worlds climate during the last thousands of years. It's known that there's a change happening worldwide but its causes came from many years ago, From the early bronze age until nowadays.

These years the consciousness about the topic has increased a lot, however, when the consequences appeared in the past, were they conscious about it? Did they know this happened due to their actions?

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Why is carbon dioxide from fossil fuels important to address

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Why is carbon dioxide from fossil fuels important to address

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It's important to address this as it could cause our extinction as a people and as a species.

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https://www.nrdc.org/stories/fossil-fuels-dirty-facts

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Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago. Because of their origins, fossil fuels have a high carbon content.

Oil

Crude oil, or petroleum (literally "rock oil" in Latin), is a liquid fossil fuel made up mostly of hydrocarbons (hydrogen and carbon compounds). Oil can be found in underground reservoirs; in the cracks, crevices, and pores of sedimentary rock; or in tar sands near the earth's surface. It's accessed by drilling, on land or at sea, or by strip mining in the case of tar sands oil and oil shale. Once extracted, oil is transported to refineries via supertanker, train, truck, or pipeline to be transformed into usable fuels such as gasoline, propane, kerosene, and jet fuel-as well as products such as plastics and paint.

Petroleum products supply about 35 percent of U.S. energy needs, with the transportation sector consuming the most. U.S. oil consumption in 2016 was 10 percent below the record high of 2005 and only 3 percent higher than during the 1973-74 embargo by the Organization of the Petroleum Exporting Countries (OPEC)-despite the U.S. economy tripling in size in the decades since. Demand for oil plummeted during the first two years of the COVID-19 pandemic, but it has now risen to its highest point since 2019. This is partly due to the volatile global market amid Russia's invasion of Ukraine. Still, U.S. consumption of petroleum products is forecast to decrease, at least through 2038, as fuel efficiency standards lead to cleaner-running vehicles. Continued strengthening of clean car and fuel economy standards remains critical for reducing oil consumption.

On the production side, the United States has experienced a decade-long upswing. Production growth is due in large part to advancements in horizontal drilling and hydraulic fracturing, technologies that have created a boom in U.S. shale oil and natural gas extraction. While horizontal drilling enables producers to drill down and outward-thus reaching more oil or gas from a single well-hydraulic fracturing (also known as fracking) is designed to extract oil or natural gas from unyielding rock, including shale and other formations. Fracking involves blasting huge quantities of water mixed with chemicals and sand deep into a well, at pressures high enough to fracture rock and enable the oil or gas to escape. This controversial method of extraction creates a host of environmental and health problems, including air and water pollution.

Coal

Coal is a solid, carbon-heavy rock that comes in four main varieties, differentiated largely by carbon content: lignite, sub-bituminous, bituminous, and anthracite. Nearly all of the coal burned in the United States is sub-bituminous or bituminous. Found in abundance in states, including Kentucky, Pennsylvania, West Virginia, and Wyoming, these coal types are middle of the pack in terms of carbon content and the heat energy they can produce. Regardless of variety, however, all coal is dirty. Indeed, in terms of emissions, it's the most carbon-intensive fossil fuel we can burn.

Coal is extracted via two methods: Underground mining uses heavy machinery to cut coal from deep underground deposits, while surface mining (also known as strip mining) removes entire layers of soil and rock to access coal deposits below. Strip mining accounts for about two-thirds of coal sourced in the United States. Although both forms of mining are detrimental to the environment, strip mining is particularly destructive, uprooting and polluting entire ecosystems.

Coal and the power plants that burn it account for less than a third of U.S. electricity generation, down from more than half in 2008. Cleaner, cheaper alternatives-including natural gas, renewables like solar and wind, and energy-efficient technologies-make coal far less economically attractive and demand for coal has fallen steadily since 2014. Today, coal-fired power plants continue to close, despite the former Trump administration's promises of a revived industry. At the moment, market fluctuations amid the war in Ukraine have resulted in a sudden uptick in coal consumption, especially in its competition with fracked (natural) gas, but that is expected to be temporary as market forces propel alternative energy sources forward.

Fracked (natural) gas

Composed mostly of methane, fracked gas is generally considered either conventional or unconventional, depending on where it's found underground. Conventional gas is located in porous and permeable rock beds or mixed into oil reservoirs and can be accessed via standard drilling. Unconventional gas is essentially any form of gas that is too difficult or expensive to extract via regular drilling, requiring a special stimulation technique, such as fracking.

In the United States, the development and refinement of processes like fracking have helped make the country the world's top producer of gas since 2009-and the biggest consumer of it too. Abundant in the United States, gas produces 38 percent of U.S. energy needs and is the largest source of energy for electricity. Forecasts suggest it will become an even greater part of the U.S. energy mix, threatening to exacerbate air and water pollution.

Disadvantages of Fossil Fuels

Land degradation

Unearthing, processing, and moving underground oil, gas, and coal deposits take an enormous toll on our landscapes and ecosystems. The fossil fuel industry leases vast stretches of land for infrastructure, such as wells, pipelines, and access roads, as well as facilities for processing, waste storage, and waste disposal. In the case of strip mining, entire swaths of terrain-including forests and whole mountaintops-are scraped and blasted away to expose underground coal or oil. Even after operations cease, the nutrient-leached land will never return to what it once was.

As a result, critical wildlife habitat-land that is crucial for breeding and migration-ends up fragmented and destroyed. Even animals able to leave can end up suffering, as they're often forced into less-than-ideal habitat and must compete with existing wildlife for resources.

Water pollution

Coal, oil, and gas development pose myriad threats to our waterways and groundwater. Coal mining operations wash toxic runoff into streams, rivers, and lakes and dump vast quantities of unwanted rock and soil into streams. Oil spills and leaks during extraction or transport can pollute drinking water sources and jeopardize entire freshwater or ocean ecosystems. Fracking and its toxic fluids have also been found to contaminate drinking water, a fact that the U.S. Environmental Protection Agency was slow to recognize.

Meanwhile, all drilling, fracking, and mining operations generate enormous volumes of wastewater, which can be laden with heavy metals, radioactive materials, and other pollutants. Industries store this waste in open-air pits or underground wells that can leak or overflow into waterways and contaminate aquifers with pollutants linked to cancer, birth defects, neurological damage, and much more.

Emissions

Fossil fuels emit harmful air pollutants long before they're burned. Indeed, some 17.6 million Americans are exposed daily to toxic air pollution from active oil and gas wells and from transport and processing facilities. These include benzene (linked to childhood leukemia and blood disorders) and formaldehyde (a cancer-causing chemical). A booming fracking industry will bring that pollution to more backyards, despite mounting evidence of the practice's serious health impacts. Mining operations are no better, especially for the miners themselves, generating toxic airborne particulate matter. Strip mining-particularly in places such as Canada's boreal forest -can release giant carbon stores held naturally in the wild.

Global warming pollution

When we burn oil, coal, and gas, we don't just meet our energy needs-we drive the current global warming crisis as well. Fossil fuels produce large quantities of carbon dioxide when burned. Carbon emissions trap heat in the atmosphere and lead to climate change. In the United States, the burning of fossil fuels, particularly for the power and transportation sectors, accounts for about three-quarters of our carbon emissions.

Other forms of air pollution

Fossil fuels emit more than just carbon dioxide when burned. Coal-fired power plants single-handedly generate 35 percent of dangerous mercury emissions in the United States, as well as two-thirds of U.S. sulfur dioxide emissions (which contribute to acid rain) and the vast majority of soot ( particulate matter) in our air. Meanwhile, fossil fuel-powered cars, trucks, and boats are the main contributors of poisonous carbon monoxide and nitrogen oxide, which produces smog on hot days and leads to respiratory illnesses from sustained exposure.

Ocean acidification

When we burn oil, coal, and gas, we change the ocean's basic chemistry, making it more acidic. Our seas absorb as much as a quarter of all man-made carbon emissions. Since the start of the Industrial Revolution (and our coal-burning ways), the ocean has become 30 percent more acidic. As the acidity in our waters goes up, the amount of calcium carbonate-a substance used by oysters, lobsters, and countless other marine organisms to form shells-goes down. This can slow growth rates, weaken shells, and imperil entire food chains.

Ocean acidification impacts coastal communities as well. In the Pacific Northwest, it's estimated to have cost the oyster industry millions of dollars and thousands of jobs.

Building a Clean Energy Future

We're not locked into a fossil fuel future, however. We've made major progress in scaling up renewable energy and energy efficiency in the United States over the past decade, thanks to federal, state, and local policies that have helped to grow the clean energy economy. We're also using energy much more efficiently than we used to.

State and federal incentives, along with falling prices, are pushing our nation-and the world-toward cleaner, renewable energy sources such as wind and solar. Renewables are on track to become a cheaper source of energy than fossil fuels, which is spurring a boom in clean energy development and jobs. Significantly higher levels of renewables can be integrated into our existing grid, though care must be taken to site and build renewable energy responsibly.

Meanwhile, energy efficiency is our cleanest, cheapest, and largest energy resource, contributing more to the nation's energy needs over the past 40 years than oil, coal, natural gas, or nuclear power. It accounted for nearly 2.4 million U.S. jobs before the pandemic in 2019-at least 10 times more than oil and gas drilling or coal mining.

If we can put the right policies in place, we are poised to make dramatic progress toward a clean energy future. In fact, President Biden has proposed a target of the country running on 80 percent clean electricity by 2030. To meet that target, we will need to ramp up efficiency and cut energy demand in half, increase renewable energy resources to supply at least 80 percent of our power, electrify almost all forms of transportation, and get fossil fuels out of our buildings. Achieving these goals will require sustained, coordinated policy efforts from all levels of government, the private sector, and local communities. But with the proven, demonstrated clean energy technologies and resources that we have today, we know we can do it.
This story was originally published on June 29, 2018, and has been updated with new information and links.

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Mining, drilling, and burning dirty energy are harming the environment and our health. Here's everything you need to know about fossil fuels, and why we need to embrace a clean energy future.

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How do you think we should deal with climate change?

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How do you think we should deal with climate change?

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We should reduce the consuption of meat and plastic and start protecting our oceans. Besides we should stop deforestating forest and invest in renewable energy.

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As we can see worldwide there have already been effects due to climate change. However, there are many scepticals that think this isn´t true. but we think there are obvious changes the last few years.

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What do you think argee the main causes for it?

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What do you think argee the main causes for it?

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The excesive co2 with wich we pollute the atmosphere is one of the main causes. On the other hand, green house effect is aslo a big cause.