Leaders around the world decided to meet every 10 years to discuss the state of the world's environment.

Being held during the period of the Cold War, it failed and is not considered an official summit.

The International body realized the seriousness and thus set up the IPCC. Scientists around the world gathered to research.

The first major climate change conference. A target was proposed.

The IPCC reported that the planet was warming and that it was human activities causing it.

Largest gathering of world leaders. There they made the Rio Convention which called all parties to reduce the GHG emissions to the 1990 emissions.

Held each year to review the Rio Convention.

A more certain report confirming that human activities caused the changing climates.

• The countries part of Rio Convention admitted that climate change is threatening.

• The Kyoto Protocol was made and signed.

• Discussed the implementation so the Kyoto Protocol but decided that it should be finalized later on.

• Failed, with disagreement on "carbon sinks".

• The world finally agreed on the Protocol. 180 countries agreed with the Kyoto Protocol.

• Russia's crucial ratification fulfills the requirements for the Protocol to take effect. The countries collectively are responsible for 55% of the GHG emissions

• Three months after required number of countries, the Kyoto protocol took effect.