Global warming is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-twentieth century and its projected continuation.The global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the hundred years ending in 2005.[1] The Intergovernmental Panel on Climate Change (IPCC) concludes "most of the observed increase in globally averaged temperatures since the mid-twentieth century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations"[1] via the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward.[2][3] These basic conclusions have been endorsed by at least thirty scientific societies and academies of science,[4] including all of the national academies of science of the major industrialized countries.[5][6][7] While individual scientists have voiced disagreement with some findings of the IPCC.
Mungkin masih banyak orang yang tidak sadar dengan dampak atas bahayanya pemanasan global atau global warming. Saat ini masih banyak orang yang dengan sesuka hati menggunakan AC, pemanas ruangan, berlebihan dalam menggunakan air, kemana-mana naik mobil pribadi dan lain sebagainya. Sementara kebiasaan-kebiasan tersebut sadar atau tidak, sebenarnya dapat memicu semakin meningkatnya pamanasan global. Indonesia, negara yang kita tempati ini merupakan kontributor/penyumbang terbanyak urutan nomer tiga dalam hal meningkatnya pemanasan global.