Since 1990, sea levels have risen by an average of about 18 centimeters. The threat from melting glaciers not only puts some well-known cities at risk of being submerged, but as the Arctic glaciers accelerate to melt, the distribution of Earth's gravity will also be directly affected. In addition, the Arctic's receding glaciers and melting water are leaking methane on a large scale, which will have a significant impact on the global climate. The text is intended to explain:. ['Climate change in the Arctic has increased significantly in the last century.', 'Melting glaciers will pose many potential dangers to the planet.', 'Governing methane leaks in the Arctic will be a major challenge for humanity.', 'Melting glaciers will put more and more cities at risk.']