2020 is one of the three warmest years on record. What are the disadvantages of climate warming?

Global warming is a long-term accumulation process. This is due to the accumulation of greenhouse gases such as carbon dioxide and methane in the Earth's atmosphere, which prevents the sun's heat from escaping. The issue of global warming has always been controversial. Some doubt whether it really exists. When it comes to global warming, people don't talk about how much warmer this summer will be than last year. Rather, it refers to global climate change and its impact on the natural and human living environment. One consideration is changes in Earth's climate over decades, rather than purely seasonal changes. Claims about global warming itself are somewhat misleading because it leads people to think the climate will get hotter, rather than drier and harsher. Scientists study climate by observing and measuring meteorological changes. Glaciers are melting much more now than they were 150 years ago. Over the past 100 years, the global average temperature has increased by approximately 0.8 degrees Celsius. Scientists use computer models to predict future climate conditions. Compared with current climate conditions, global average temperatures will increase by 1.1-6.4 degrees Celsius by the end of the 21st century.

Now we will look at several major impacts of climate change, including some direct effects that can be observed and some predicted by climate models. Sea levels rise. The onset of hotter weather on Earth doesn't mean Miami's lifestyle will align with Africa, but it does lead to rising sea levels. How does hot weather cause sea levels to rise? It turns out that too much temperature can cause icebergs to melt. The continued melting of sea ice and polar ice caps increases the amount of water in the oceans, causing sea levels to rise.

If the beach is flooded by sea water, people will lose a lot of fun. Currently, many cities around the world, like Miami, face the threat of rising sea levels. Scientists can measure the impact of the melting Greenland ice sheet: The flow of the Colorado River has increased sixfold. Scientists predict that if ice shelves in Greenland and Antarctica continue to melt, sea levels will be 6 meters higher than today by 2100. This would inundate many tropical islands and low-lying areas in Indonesia, as well as Miami, New York City's Manhattan, and Bangladesh.

Glaciers melt. Observing whether a glacier is melting requires no special equipment. As surface temperatures rise, vegetation begins to grow after the permafrost that originally covered the surface of the tundra melts. Glaciers in Montana's national parks have declined significantly during this century. In addition, Himalayan glaciers are the main source of Ganges water. The Ganges provides drinking and irrigation water to 500 million people. It is said that the current water volume is decreasing at a rate of 37 meters per year.