Pollution is the introduction or presence of a harmful substance in the environment. Pollution occurs in many forms. It is not only one of the main drivers of biodiversity loss and ecosystem degradation, but also a relevant factor in the development of disaster risk. For example, pollution of terrestrial or marine habitats can lead to a food crisis in a region. Similarly, poor management of waste can increase the likelihood of disasters, such as floods or chemical explosions. Additionally it magnifies their impacts, for example by contaminating fresh water sources or transporting industrial pollutants close to food sources or vulnerable communities.
Lagos faces increasingly severe annual flooding, exacerbated by sea level rise and subsidence. In 2021, floods again submerged vehicles and houses, displacing thousands from their homes.
During the 2020-2021 typhoon season, for the first time in 56 years, no typhoon made landfall on Taiwan, leading to one of the worst droughts in the island’s history. As reservoirs fell below 5% capacity, more than one million households and businesses had to ration water.
Chinese Paddlefish have been around for an estimated 200 million years, but were declared extinct in 2020. While overfishing and pollution played an accelerating role, much of its demise can be attributed to the multiple dam constructions on the Yangtze River.
During summer 2020, around 2,300 km of the Great Barrier Reef in Australia was affected by a record mass bleaching event where corals expel their algae and turn white. Over 25% of the Great Barrier Reef suffered severe bleaching, seriously threatening them with extinction.