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The history of the scientific discovery of climate change began in the early 19th century when ice ages and other natural changes in paleoclimate were first suspected and the natural greenhouse effect was first identified. In the late 19th century, scientists first argued that human emissions of greenhouse gases could change Earth's energy ...
Other approaches to mitigating climate change have a higher level of risk. Scenarios that limit global warming to 1.5 °C typically project the large-scale use of carbon dioxide removal methods over the 21st century. [292] There are concerns, though, about over-reliance on these technologies, and environmental impacts. [293]
Modern physics. Freeman John Dyson FRS (15 December 1923 – 28 February 2020) [ 1] was a British-American theoretical physicist and mathematician known for his works in quantum field theory, astrophysics, random matrices, mathematical formulation of quantum mechanics, condensed matter physics, nuclear physics, and engineering. [ a][ 3] He was ...
The global warming potential (GWP) is defined as an "index measuring the radiative forcing following an emission of a unit mass of a given substance, accumulated over a chosen time horizon, relative to that of the reference substance, carbon dioxide (CO 2 ). The GWP thus represents the combined effect of the differing times these substances ...
Svante Arrhenius in the 19th century was the first person to quantify global warming as a consequence of a doubling of the concentration of CO 2. In his first paper on the matter, he estimated that global temperature would rise by around 5 to 6 °C (9.0 to 10.8 °F) if the quantity of CO 2 was doubled.
His team also concluded that the decline in global aerosol emissions from air pollution will accelerate the rate of global warming, going from an increase of 0.18 °C per decade between 1970 and 2010 to an increase of 0.27 °C per decade after 2010, with the world passing the 1.5 °C threshold before the end of the 2020s and the 2 °C threshold ...
Warm-water coral reefs are very sensitive to global warming and ocean acidification. Coral reefs provide a habitat for thousands of species. They provide ecosystem services such as coastal protection and food. But 70–90% of today's warm-water coral reefs will disappear even if warming is kept to 1.5 °C (2.7 °F).
A short description of the RCPs is as follows: RCP 1.9 is a pathway that limits global warming to below 1.5 °C, the aspirational goal of the Paris Agreement. [27] RCP 2.6 is a very stringent pathway. [27] RCP 3.4 represents an intermediate pathway between the very stringent RCP2.6 and less stringent mitigation efforts associated with RCP4.5. [28]
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