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A recent study of El Niño patterns suggests that the French Revolution was caused in part by the poor crop yields of 1788–89 in Europe, resulting from an unusually strong El-Niño effect between 1789 and 1793. [19] 1798 Thomas Robert Malthus publishes An Essay on the Principle of Population, thus beginning Malthusian economics.
2018 - The IPCC releases a special report, warning that a 1.5 degree global warming could have disastrous consequences. [31] 2018 - Greta Thunberg starts a school strike for climate, sitting outside the Swedish Parliament. 2019 - Earth Day and National Cleanup Day organize the first coordinated cleanup event held in all 50 States and US Territories
By far the best observed period is from 1850 to the present day, with coverage improving over time. Over this period the recent instrumental record, mainly based on direct thermometer readings, has approximately global coverage. It shows a general warming in global temperatures. Before this time various proxies must be used.
One of the hotter periods was the Last Interglacial, around 125,000 years ago, where temperatures were between 0.5 °C and 1.5 °C warmer than before the start of global warming. [40] This period saw sea levels 5 to 10 metres higher than today. The most recent glacial maximum 20,000 years ago was some 5–7 °C colder. This period has sea ...
Climate change may refer to any time in Earth's history, but the term is now commonly used to describe contemporary climate change, often popularly referred to as global warming. Since the Industrial Revolution , the climate has increasingly been affected by human activities .
Publicity over the concerns of scientists about the implications of global warming led to increasing public and political interest, and the Reagan administration, concerned in part about the political impact of scientific findings, successfully lobbied for the 1988 formation of the Intergovernmental Panel on Climate Change to produce reports subject to detailed approval by government delegates ...
The history of environmental pollution traces human-dominated ecological systems from the earliest civilizations to the present day. [1] This history is characterized by the increased regional success of a particular society, followed by crises that were either resolved, producing sustainability, or not, leading to decline.
The Accord states that global warming should be limited to below 2.0 °C (3.6 °F). [34] The Accord does not specify what the baseline is for these temperature targets (e.g., relative to pre-industrial or 1990 temperatures). According to the UNFCCC, these targets are relative to pre-industrial temperatures. [40] 114 countries agreed to the ...