1. False
In the past several decades, and especially in the past 20 years, the global temperatures have been on the rise. The rise of the temperature is not the same in all places, and there are differences between the regions, especially between the latitudes. The lowest latitudes tend to be the least affected, as the temperature has increased the least. The mid-latitudes have moderate increase in the temperatures, while the high latitudes have experienced the largest increase in temperatures, which has resulted in melting of the ice sheets.
2. Both the Arctic Sea and the land ice on Antarctica and Greenland have lost large amounts of ice
With the increase of the global temperatures because of the strengthening of the greenhouse effect, the high latitudes have been the most affected. The largest ice masses on the planet, have been heavily affected by this, with the ice sheets and glaciers on Antarctica, the Arctic, and Greenland all shrinking. Because they have all been losing lot of ice, it has affected the ocean waters, resulting in sea level rise, putting in danger lot of cities and islands around the world.
3. burning of fossil fuels - global temperature rise - the greenhouse effect - ocean acidification - sea level rise - shrinking ice sheets - warming oceans - glacial retreat
The global warming is a cyclic process that occurs on the planet. During the Pleistocene it has been occurring between the glacial periods. There are several factors that contribute to the global warming, some of which are cyclical movements and positioning of the Earth, while some are a result of the processes on the planet. The global warming has been a very important topic in the past few decades, with the main reason being that the human activity is actually resulting in speeding up of this process.
4. Incoming solar radiation is trapped in the Earth's atmosphere by certain molecules resulting in warmer surface temperature
The greenhouse affect is a process that occurs naturally, but in the past couple of centuries, the humans have also contributed to it. This effect is basically the accumulation of greenhouse gasses in the atmosphere, which manage to trap heat, thus increase the atmospheric temperature and the surface temperature of the planet. There are multiple consequences from this effect, such as rising temperatures, acidification of the oceans, melting of the ice sheets, rise of the sea waters.
