"Natural ecosystems are humanity's first line of defence against floods, droughts, heatwaves, hurricanes, and the other mounting impacts of climate change." This idea permeates a report published last month by the Global Commission on Adaptation under the title Adapt Now: A Global Call for Leadership on Climate Resilience.
The commission is headed by Ban ki-Moon, a former secretary-general of the United Nations; Kristalina Georgieva, CEO of the World Bank; and Bill Gates of the Bill and Melinda Gates Foundation. Their report echoes the (disputed) claim that "climate change" is increasing the number and ferocity of "potentially deadly weather events". But it then points out that humans "have adapted to climate variability for thousands of years" and that "humanity has always lived under the looming threat of nature's fury".
Looking ahead to the "climate adaptation summit" to be held in the Netherlands in October next year, the report identifies five "areas" on which $1.8 trillion should be spent between 2020 and 2030. This amount is less than 1% of projected global investment over that period.
The five areas are early warning systems (against, for example, floods), "climate-resilient infrastructure" (such as the Thames Barrier in London), improved dryland crop production, global mangrove protection, and making water resources more resilient.
Many climate activists point to mounting losses from floods or hurricanes and blame these on "climate change". The report has a different perspective. In their rush to grow, it says, many cities have "relentlessly stripped away or built over floodplains, forests, and wetlands that could have absorbed stormwater or offered respite and precious water during heat waves and droughts". More and more people are therefore in harm's way all over the world. More than 880 million live in informal settlements "where opportunities are few and access to basic services like electricity, basic healthcare, sanitation, education, and clean water is scarce to non-existent".
Disaster risk management includes moving people away from areas vulnerable to flooding. Land use planning and zoning regulation can direct development away from such areas. "Restoring mangrove forests" can "offer protection from rising seas and storm surges". Docks and wharfs can be raised to stay above rising seas. Cities can improve stormwater management. Green roofs and greater tree cover can cool cities and reduce the use of energy. Drip irrigation can be used to reduce water wastage in farming. Intense wildfires can be combated by better forest management. And so on.