human influence of global warming
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Answer:
The relationship between humanity and the environment is a delicate balance. Since the industrial revolution, the world's population has increased exponentially, and with the population growth, the environment has been profoundly affected. Deforestation, pollution and global climate changes are amongst the adverse effects the population and technological expansion has introduced. Included in this category are both subjects dealing with attempts to reduce the negative impact on the environment, and subjects which aim to gain a greater understanding of the environment itself.
Global warming is the long-term rise in the average temperature of the Earth's climate system, an aspect of current climate change shown by temperature measurements and by multiple effects of the warming.[1][2] The term commonly refers to the mainly human-caused increase in global surface temperatures and its projected continuation.[3][4] In this context, the terms global warming and climate change are often used interchangeably,[5] but climate change includes both global warming and its effects, such as changes in precipitation and impacts that differ by region.[6] There were prehistoric periods of global warming,[7] but observed changes since the mid-20th century have been much greater than those seen in previous records covering decades to thousands of years.[1][8]
In 2013, the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report concluded, "It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century."[9] The largest human influence has been the emission of greenhouse gases such as carbon dioxide, methane, and nitrous oxide. Climate model projections summarized in the report indicated that during the 21st century the global surface temperature is likely to rise a further 0.3 to 1.7 °C (0.5 to 3.1 °F) in a moderate scenario, or as much as 2.6 to 4.8 °C (4.7 to 8.6 °F) in an extreme scenario, depending on the rate of future greenhouse gas emissions and on climate feedback effects.[10] These findings have been recognized by the national science academies of the major industrialized nations[11] and are not disputed by any scientific body of national or international standing.[12][13]
Answer:
Earth's surface has undergone unprecedented warming over the last century, and especially in this century.
Every single year since 1977 has been warmer than the 20th century average, with 16 of the 17 warmest years on record occurring since 2001, and 2016 being the warmest year on recorded history. A study from 2016 found that without the emissions from burning coal and oil, there is very little likelihood that 13 out of the 15 warmest years on record would all have happened.