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In the absence of anthropogenic activities, carbon dioxide (CO2) levels in the atmosphere would be fairly static. Animals exhale carbon dioxide, but vegetation converts this back into edible products that are then consumed by those animals. Similarly, rotting vegetation gives off carbon dioxide, but the vegetation is soon replaced by new vegetation that requires the same amount of carbon. The natural cycle contributes no net increase in carbon dioxide concentrations in the atmosphere. So, CO2 concentrations had remained around 260-280 parts per million (ppm) until the time of the Industrial revolution, when the level of CO2 began to rise in line with increasing use of fossil fuels.
The increase from 260-280 ppm to the present 390 ppm of atmospheric carbon dioxide is entirely due to human activities.
another view
But that does not answer the question. Humans produce about 6% of all CO2 emissions and 0.28% of all green house gas emissions now. At no point in history has CO2 ever been known to be 'fairly' static. It has always followed temperatures by about 800 years.
What else can I help you with?
Where does the element sulfur come from in the Earth?
Sulfur is thought to have originated from supernova explosions, where the element was forged in the stellar cores. It is abundant in the Earth's crust and is found in minerals, rocks, and volcanic emissions. Sulfur is also released into the environment through human activities such as burning of fossil fuels and industrial processes.
What are the three primary pollutants?
The three primary pollutants are particulate matter (PM), nitrogen dioxide (NO2), and sulfur dioxide (SO2). These pollutants come from various sources such as vehicles, industrial activities, and power plants, and can have harmful effects on human health and the environment.
How many humans put greenhouse gases into Earth's atmosphere?
The majority of greenhouse gas emissions come from human activities, such as burning fossil fuels, deforestation, and industrial processes. The exact number of individuals responsible for these emissions is difficult to quantify, but it is estimated that billions of people contribute to the release of greenhouse gases into the Earth's atmosphere.
Is human activity the only source of pollution?
No, human activity is not the only source of pollution. Natural sources such as wildfires, volcanic eruptions, and organic decay can also contribute to pollution. However, human activities like burning fossil fuels, industrial processes, and deforestation are major contributors to pollution.
Where does nitrogen come from in the atmosphere and how does it impact the environment?
Nitrogen in the atmosphere primarily comes from natural processes like volcanic eruptions and bacterial activity in soil. It impacts the environment by contributing to air pollution, acid rain, and eutrophication of water bodies, which can harm ecosystems and human health.
What percentage of greenhouse gases are produced by humans including the use of recovered hydrocarbons?
Approximately 75% of greenhouse gases emitted by human activities come from the burning of fossil fuels, including recovered hydrocarbons like coal, oil, and natural gas. These emissions contribute significantly to climate change by trapping heat in the Earth's atmosphere.
Why does Toyota Celica engine warning light come on emissions?
The engine warning light for emissions might come on in a Toyota Celica if the Oxygen Sensors are bad. It might also come on if the catalytic converter is not working properly or is plugged.
How does human activity affect the atmosphere?
Mostly our carbon dioxide emissions from burning fossil fuels, contributing to the 'greenhouse effect' and trapping heat energy inside the Earth's biosphere. Gases such as methane (can come from spray cans) and also carbon dioxide are also burning away the Ozone Layer, a helpful layer of the stratosphere which blocks the most of the harmful UV rays from the sun.
What causes the service emissions system light to come on on Ford Escape?
There can be several causes for the service emissions systems light to come on in a Ford Escape. The light can indicate an 02 sensor is out or it can indicate an exhaust leak.
When does Paranormal Activity come out?
Paranormal Activity was released on October 16, 2009.
Why does emissions light come on?
If the emissions light turns on there is a problem with the exhaust system. The oxygen sensor, erg system and exhaust should be checked for any leaks or malfunctions.
What causes the check engine to come on your 1992 Ford Taurus?
There is a problem with the emissions system.
Why do environmentalists believe that carbon dioxide emissions have increased?
At this time we are seeing rapid industrialization in China and India; conservation measures in the western world have not come close to offsetting the increased emissions from developing economies. Carbon dioxide emissions have increased.
What can you do if it come from excessive sexual activity?
If what comes?
When will Paranormal Activity 2 come to Netflix?
Paranormal Activity 2 is currently available on Netflix.
When does Paranormal Activity 4 come out?
Paranormal Activity 4 is scheduled for an October 2012 release.
When does Paranormal Activity 3 come out on DVD?
paranormal activity 3 comes out on the 27th February
