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This is the instrument Gilbert Plass used to proof his theory

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Gilbert Plass revealed his theory about climate change.

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1958, first Carbon Dioxide is measured in the atmosphere

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1958, first Carbon Dioxide is measured in the atmosphere

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1987, Montreal protocol on substances that deplete in the ozone layer

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1987, Montreal protocol on substances that deplete in the ozone layer

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1991, first strategy for climate change is made

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1991, first strategy for climate change is made

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2000-2004, first European climate change programme

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2000-2004, first European climate change programme

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2002, first climate change study available

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2002, first climate change study available

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Study about the heat of renewable energy sources and the most used energy sources.

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2005, first large greenhouse gas emissions trading scheme in the world

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2005, first large greenhouse gas emissions trading scheme in the world

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2009, COP in Copenhagen + Copenhagen accord

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2009, COP in Copenhagen + Copenhagen accord