Previous Year Question

Global warming can cause sea-level rise, changes in coastal areas, and changes in agricultural or cropping systems. Therefore, all the given options are correct.

First, rising global temperatures cause seawater to undergo thermal expansion, while melting glaciers and land ice add more water to the oceans. According to the IPCC, global mean sea level is rising and sea-level rise will continue throughout the 21st century.

Second, rising sea levels increase the risks of coastal flooding, erosion and inundation. As a result, the position and form of coastlines can change over time in vulnerable areas. The IPCC identifies flooding and erosion among the major coastal risks associated with sea-level rise.

Third, changes in temperature and rainfall, along with drought and extreme heat, can affect crop productivity, crop suitability and agricultural systems. The IPCC concludes that climate change is already affecting crop production and is expected to place increasing pressure on agricultural systems.

Thus, sea-level rise, coastline changes and changes in crop patterns are all possible consequences of global warming.