![]() In the United States, key Senate Republicans denounce the accord as "dead on arrival."Ģ001 - U.S President George W. Under the Kyoto Protocol, developed countries are obligated to reduce emissions between 20 from 1990 levels, with different limits assigned to different countries. The final document calls for legally binding emissions targets.ġ997 - At COP3 in Kyoto, Japan, parties agree to the first treaty that requires specific emissions reductions. The treaty does not set out binding emissions targets.ġ995 - UNFCCC treaty members gather for a first "conference of parties," or COP, in Berlin. The UNFCCC's goal is to control emissions to prevent extreme climate change, but it also enshrines the idea of "common but differentiated responsibilities," meaning developed countries must do more because they are responsible for most historical emissions. Framework Convention on Climate Change at the Rio Earth Summit. British Prime Minister Margaret Thatcher says binding emissions targets are needed.ġ992 - Countries sign onto the U.N. His findings result in the "Keeling Curve," a graph showing CO2 concentrations steadily increasing.ġ988 - James Hansen, an American climate scientist, testifies before Congress that the planet is warming because of a human-caused buildup of greenhouse gasses, and notes that this is already altering the climate and weather.ġ990 - At the U.N.'s so-called Second World Climate Conference, scientists highlight the risks of global warming to nature and society. He correlates the temperature trends with measured rises in atmospheric CO2, and proposes the temperature change is linked.ġ958 - American scientist Charles David Keeling starts systematically measuring atmospheric CO2 levels over Hawaii's Mauna Loa Observatory. In the 1890s, Swedish scientist Svante Arrhenius calculates the temperature effect of a doubling of atmospheric CO2, showing that burning fossil fuels would likely warm the planet.ġ938 - By compiling historical weather data, British engineer Guy Callendar for the first time shows the planet's temperatures are rising in the modern era. Here are some key moments in the global climate conversation:ġ800s - Throughout the 1800s, several European scientists study how different gases and vapours can trap heat in Earth's atmosphere. ![]() But the realization that industrial activity was causing climate change, and discussions about what to do about it, began much earlier. climate conference in Glasgow, Scotland, marks the 26th time since 1995 that world leaders have gathered to confront global warming. Ahead of the U.N.'s COP26 climate summit in Glasgow, here is a look at some key moments in the global climate conversation
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