It is a measure of each gas's warming effect per mass unit over a period of 20 or years, relative to carbon dioxide. Greenhouse gases hold some of the sun's heat in the atmosphere and contribute to greenhouse effect this way. Some gases have an indirect effect:. Sulphur oxide SO2 , on the other hand, cools down the climate. In greenhouse gas assessments, methane is addressed separately, as it is the most significant VOC, and VOCs refer to the other compounds.
VOCs have a direct effect by absorbing heat radiation from the ground, but their indirect contribution is more significant. They react with hydroxyl radicals OH- in the air, forming tropospheric ozone, which is a greenhouse gas.
When they reach the stratosphere, they react with OH-, forming water vapour, which is a greenhouse gas. VOCs are also converted to methane. VOC abatement. Intelligent Air Quality Service Ultraclean indoor air as a service. Healthcare Eliminating airborne microbes in critical environments. Dental Removing harmful particles in dental care. The Greenhouse Effect itself is not inherently harmful to humans but the levels of greenhouse gases in the atmosphere can trap more heat, causing global warming.
The greenhouse effect itself is not inherently harmful to humans. The greenhouse effect releases some energy from the planet but it also retains energy, warming the planet. Refer to this related question on how greenhouse gases are good and bad. It is the rapidly rising levels of greenhouse gases in the atmosphere that trap more heat, causing global warming.
Refer to this related question on how the greenhouse effect is connected to global warming. Why is the greenhouse effect harmful to humans? Jan 31, It causes global warming. You might hear people talking about the greenhouse effect as if it is a bad thing. This is happening because we are currently adding more greenhouse gases to our atmosphere, causing an increased greenhouse effect.
The increased greenhouse effect is causing changes in our planet that can affect our lives. The major Greenhouse Gas, carbon dioxide, emitted naturally and by the burning of fossil fuels, stays in the atmosphere a long time. Fluorinated Gases Emitted from a variety of manufacturing and industrial processes, fluorinated gases are man-made.
Although fluorinated gases are emitted in smaller quantities than other greenhouse gases they account for just 2 percent of man-made global greenhouse gas emissions , they trap substantially more heat. Indeed, the GWP for these gases can be in the thousands to tens of thousands, and they have long atmospheric lifetimes, in some cases lasting tens of thousands of years.
Replacing these HFCs and properly disposing of them is considered to be one of the most import ant climate actions the world can take. Water Vapor The most abundant greenhouse gas overall, water vapor differs from other greenhouse gases in that changes in its atmospheric concentrations are linked not to human activities directly, but rather to the warming that results from the other greenhouse gases we emit.
Warmer air holds more water. And since water vapor is a greenhouse gas, more water absorbs more heat, inducing even greater warming and perpetuating a positive feedback loop. Population size, economic activity, lifestyle, energy use, land use patterns, technology, and climate policy: According to the Intergovernmental Panel on Climate Change IPCC , these are the broad forcing s that drive nearly all human-caused greenhouse gas emissions.
Electricity and Heat Production The burning of coal, oil, and natural gas to produce electricity and heat accounts for one-quarter of worldwide human-driven emissions, making it the largest single source. Agriculture and Land Use Changes About another quarter of global greenhouse gas emissions stem from agriculture and other land-use activities such as deforestation.
In the United States, agricultural activities —primarily the raising of livestock and crops for food—accounted for 8.
Of those, the vast majority were methane which is produced as manure decomposes and as beef and dairy cows belch and pass gas and nitrous oxide often released with the use of nitrogen-heavy fertilizers. Trees, plants, and soil absorb carbon dioxide from the air. The plants and trees do it via photosynthesis a process by which they turn carbon dioxide into glucose ; the soil houses microbes that carbon binds to.
So nonagricultural land-use changes such as deforestation, reforestation replanting in existing forested areas , and afforestation creating new forested areas can either increase the amount of carbon in the atmosphere as in the case of deforestation or decrease it via absorption, removing more carbon dioxide from the air than they emit.
When trees or plants are cut down, they no longer absorb carbon dioxide, and when they are burned or decompose, they release carbon dioxide back into the atmosphere. In the United States, land-use activities currently represent a net carbon sink , absorbing more carbon dioxide from the air than they emit.
Industry About one-fifth of global human-driven emissions come from the industrial sector, which includes the manufacturing of goods and raw materials like cement and steel , food processing, and construction.
In , industry accounted for In the United States, with Americans buying larger cars and taking more flights and with low gas prices encouraging drivers to use their cars more, transportation is the largest contributor of greenhouse gases.
It accounted for Carbon dioxide is the primary gas emitted, though fuel combustion also releases small amounts of methane and nitrous oxide, and vehicle air conditioning and refrigerated transport release fluorinated gases too. Nationwide, cars and trucks are responsible for more than 80 percent of transportation-related carbon emissions. Buildings Operating buildings around the world generates 6.
In the United States, homes and businesses accounted for about 11 percent of warming emissions. These emissions, made up mostly of carbon dioxide and methane, stem primarily from burning natural gas and oil for heating and cooking, though other sources include managing waste and wastewater and leaking refrigerants from air-conditioning and refrigeration systems. Other Sources This category includes emissions from energy-related activities other than fossil fuel combustion, such as the extraction, refining, processing, and transportation of oil, gas, and coal.
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