Tide gauge readings, core samples, and satellite measurements tell us that over the past 100 years, the global sea level has risen about 4 to 8 inches. The yearly rate over the past couple decades is twice than the average speed of the past 8- years. Burning fossil fuels and other environmentally harming activities over the past century has caused temperatures to rise. During the summer, glaciers melt significantly less than previous years and during winter, less snow falls, causing sea levels to rise. Mountain glaciers form in high mountain areas. The largest mountain glaciers are in Arctic Canada, the Andes in South America, the Himalaya in Asia, and Alaska. Valley Glaciers are from the mountains, but slid down valleys. Tidewater glaciers
