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These data, known as the Keeling Curve, have iconic status in climate change science as evidence of the effect of human activities on the chemical composition of the global atmosphere. [ 37 ] Keeling's initial 1958 measurements showed 313 parts per million by volume ( ppm ).
The American Association for the Advancement of Science adopted an official statement on climate change in 2006: "The scientific evidence is clear: global climate change caused by human activities is occurring now, and it is a growing threat to society. ... The pace of change and the evidence of harm have increased markedly over the last five ...
A 2019 review of scientific papers found the consensus on the cause of climate change to be at 100%, [6] and a 2021 study concluded that over 99% of scientific papers agree on the human cause of climate change. [7] The small percentage of papers that disagreed with the consensus often contained errors or could not be replicated. [8]
The public substantially underestimates the degree of scientific consensus that humans are causing climate change. [112] Studies from 2019–2021 [113] [114] [115] found scientific consensus to range from 98.7–100%. A scientific consensus on climate change exists, as recognized by national academies of science and other authoritative bodies ...
A related phenomenon driven by climate change is woody plant encroachment, affecting up to 500 million hectares globally. [218] Climate change has contributed to the expansion of drier climate zones, such as the expansion of deserts in the subtropics. [219] The size and speed of global warming is making abrupt changes in ecosystems more likely ...
Climate 101 is a Mashable series that answers provoking and salient questions about Earth’s warming climate. Yes, the sun is a profoundly important factor in Earth's climate. It always will be ...
From ancient times, people suspected that the climate of a region could change over the course of centuries. For example, Theophrastus, a pupil of Ancient Greek philosopher Aristotle in the 4th century BC, told how the draining of marshes had made a particular locality more susceptible to freezing, and speculated that lands became warmer when the clearing of forests exposed them to sunlight.
The disparity in greenhouse gas emissions between rich and poor countries — and rich and poor people within countries — is just as extreme as economic inequality, a new report finds.