Bonjour !
Global warming is a gradual and increasingly irreversible rise in average world temperatures at sea level, caused mostly by human activities since the industrial revolution of the 18th century.
The principal causes are the widespread burning of fossil fuels including coal, oil and gas for electricity, heating, cooling and transportation, leading to the emission of carbon dioxide and other greenhouse gases. Unable to escape into space, these gases become trapped in the atmosphere, causing the planet to gradually warm over many decades. This then has an effect on climatic patterns, leading to long-term climate change that brings more storms, floods, droughts, forest fires and more extreme temperatures. Melting ice caps bring rising sea levels that threaten coastal cities, while greenhouse gas that are absorbed by oceans make them more acidic, threatening coral and marine life.
