Climate change: Climate change refers to a change in the state of the climate that can be identified (e.g., by using statistical tests)
by changes in the mean and/or the variability of its properties, and that persists for an extended period, typically decades or longer.
Climate change may be due to natural internal processes or external forcings such as modulations of the solar cycles, volcanic
eruptions, and persistent anthropogenic changes in the composition of the atmosphere or in land use. Note that the Framework
Convention on Climate Change (UNFCCC), in its Article 1, defines climate change as: “a change of climate which is attributed directly or
indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability
observed over comparable time periods.” The UNFCCC thus makes a distinction between climate change attributable to human
activities altering the atmospheric composition, and climate variability attributable to natural causes.
Hazard: The potential occurrence of a natural or human-induced physical event or trend or physical impact that may cause loss of
life, injury, or other health impacts, as well as damage and loss to property, infrastructure, livelihoods, service provision, ecosystems,
and environmental resources. In this report, the term hazard usually refers to climate-related physical events or trends or their physical
impacts.