* Permafrost temperatures have increased by up to 2 degrees Celsius in some parts of northern Canada in the last 50 years.

* This has led to the melting of permafrost and the release of methane gas, a potent greenhouse gas.

* The melting of permafrost is also causing infrastructure damage and disrupting ecosystems.

Alaska

* Permafrost temperatures in Alaska have increased by up to 3 degrees Celsius in the last 50 years.

* This has led to the melting of permafrost and the release of methane gas.

* The melting of permafrost is also causing coastal erosion and threatening wildlife habitat.

Siberia

* Permafrost temperatures in Siberia have increased by up to 4 degrees Celsius in the last 50 years.

* This has led to the melting of permafrost and the release of methane gas.

* The melting of permafrost is also causing infrastructure damage, disrupting ecosystems, and releasing ancient diseases.

Europe

* Permafrost temperatures in Europe have increased by up to 1 degree Celsius in the last 50 years.

* This has led to the melting of permafrost in the Alps, the Pyrenees, and the Scandinavian Mountains.

* The melting of permafrost is causing instability in mountain slopes, leading to landslides and avalanches.

Antarctica

* Permafrost temperatures in Antarctica have increased by up to 0.5 degrees Celsius in the last 50 years.

* This has led to the melting of permafrost in coastal areas and the release of methane gas.

* The melting of permafrost is also causing sea level rise and threatening wildlife habitat.