With warming greater than 2 °C, there is a high risk of abrupt and irreversible changes to ecosystems such as forests, which would lead to «
substantial additional climate change» considering that trees sequester significant amounts of carbon dioxide.
The water utility serving New York City has identified heavy precipitation events as one of its major
climate -
change - related concerns because such events can raise turbidity levels in some of the city's main reservoirs up to 100 times the legal limit for source quality at the utility's intake, requiring
substantial additional treatment and monitoring costs (Miller and Yates, 2006).