Science
Systematic endeavour to gain knowledge Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe.[1][2] Modern science is typically divided into two or three major branches:[3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the social sciences (e.g., economics, psychology, and sociology), which study individuals and societies.[4][5] Applied sciences are disciplines that use scientific knowledge for practical purposes, such as engineering and medicine.[6][7][8] While sometimes referred to as the formal sciences, the study of logic, mathematics, and theoretical computer science (which study formal systems governed by axioms and rules)[9][10] are typically regarded as separate because they rely on deductive reasoning instead of the scientific method or empirical evidence as their main methodology.[11][12][13][14] Etymology History Early history Middle Ages Awards
History of climate change science
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 first identified. In the late 19th century, scientists first argued that human emissions of greenhouse gases could change the climate. Many other theories of climate change were advanced, involving forces from volcanism to solar variation. In the 1960s, the warming effect of carbon dioxide gas became increasingly convincing, although some scientists also pointed out that human activities, in the form of atmospheric aerosols (e.g., "pollution"), could have cooling effects as well. During the 1970s, scientific opinion increasingly favored the warming viewpoint. Regional changes, antiquity through 19th century[edit] From ancient times, people suspected that the climate of a region could change over the course of centuries. Paleoclimate change and theories of its causes, 19th century[edit]
The 1847 lecture that predicted human-induced climate change | Leo Hickman | Environment
When we think of the birth of the conservation movement in the 19th century, the names that usually spring to mind are the likes of John Muir and Henry David Thoreau, men who wrote about the need to protect wilderness areas in an age when the notion of mankind's "manifest destiny" was all the rage. But a far less remembered American - a contemporary of Muir and Thoreau - can claim to be the person who first publicised the now largely unchallenged idea that humans can negatively influence the environment that supports them. George Perkins Marsh (1801-1882) certainly had a varied career. Here's how Clark University in Massachusetts, which has named an institute in his memory, describes him: Throughout his 80 years Marsh had many careers as a lawyer (though, by his own words, "an indifferent practitioner"), newspaper editor, sheep farmer, mill owner, lecturer, politician and diplomat. In other words, he kept himself busy.
Global Warming Effects - Global Warming Climate Hot Map
