In global city regions: quizlet1/7/2024 Carbon dioxide emissions are increasing faster in some parts of the world (for example, East Asia and the Pacific) than in others (see Figure 3).Greenhouse Gas Emissions indicator), these activities are a net source of emissions on a global scale, largely because of deforestation. While land-use change and forestry represent a net sink for emissions in the United States, absorbing carbon dioxide and offsetting emissions from other sources (see the U.S. Energy production and use (including fuels used by vehicles and buildings) represent the largest source of greenhouse gas emissions worldwide (about 75 percent of the total in 2015), followed by agriculture (12 percent in 2015) (see Figure 2).Emissions of fluorinated gases more than tripled. Methane emissions increased the least-17 percent-while emissions of nitrous oxide increased by 24 percent. Net emissions of carbon dioxide increased by 51 percent, which is particularly important because carbon dioxide accounts for about three-fourths of total global emissions. Between 19, global emissions of all major greenhouse gases increased (see Figure 1). These numbers represent net emissions, which include the effects of land use and forestry. This represents a 43 percent increase from 1990 (see Figures 1 and 2). In 2015, estimated worldwide emissions from human activities totaled nearly 47 billion metric tons of greenhouse gases, expressed as carbon dioxide equivalents.
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