Glaciers are massive sheets of ice that exist in cold climates and can grow or shrink depending on the climate. There are many different types of glaciers including retreating, piedmont, ice fields, hanging, tidewater, and surging glaciers. Most of the world's glaciers are located in Antarctica and Greenland but they can be found on every continent. Glaciers are melting due to the effects of global warming and the heat of the sun. Reducing pollution and stopping global warming can help reduce the melting of glaciers.