Questions about Climate change adaptation
Short answers, pulled from the story.
What is climate change adaptation and how does it differ from mitigation?
Climate change adaptation is the process of adjusting to the effects of climate change, both current and anticipated, in order to moderate or avoid harm to people and natural systems. Mitigation focuses on reducing greenhouse gas emissions to limit future warming. Adaptation addresses the impacts that warming, already at 1.2 degrees Celsius above pre-industrial levels as of 2022, is causing now and will continue to cause even if emissions are cut.
What are the four types of climate change adaptation actions?
The four types of adaptation actions are infrastructural and technological options (such as seawalls, flood barriers, and irrigation systems), institutional options (such as zoning laws, building codes, and insurance schemes), behavioural and cultural options (such as changing crop varieties or planting times), and nature-based solutions (such as restoring mangroves, expanding urban green space, and reinstating natural fire regimes).
How much does climate change adaptation cost and who pays for it?
The IPCC estimates adaptation will cost between $15 billion and $411 billion per year for climate change impacts through 2030, with most estimates well above $100 billion annually. A 2023 UNEP report placed the annual adaptation finance gap at $194 billion to $366 billion. Developing countries need between $215 billion and $387 billion per year, which is 10 to 18 times the current international public finance flows for adaptation.
Which countries and communities face the greatest climate change adaptation needs?
Developing countries face the greatest adaptation needs because they are most vulnerable to climate change and have the fewest resources to respond. Rainfed agriculture, which accounts for 80% of global agriculture, leaves many of the 852 million poor people in parts of Asia and Africa especially exposed to food insecurity. Coastal regions, arid areas, small island states, and urban populations in low-income countries all face acute risks.
What is maladaptation in the context of climate change?
Maladaptation refers to an adaptation action that ends up increasing vulnerability to climate change or reducing future adaptive capacity. The IPCC introduced the term in 2001. Examples include expanding irrigation into the Western Sinai desert based on temporarily higher river flows, and installing air conditioning powered by carbon-intensive electricity, which adds emissions that worsen the warming driving the need for cooling in the first place.
What are the hard and soft limits of climate change adaptation?
Soft adaptation limits exist where adaptation is still technically possible but faces social, financial, or institutional barriers. Hard limits exist where no adaptation can prevent loss. The IPCC Sixth Assessment Report in 2022 identified human systems in Australia, small islands, the Americas, Africa, and Europe as already reaching soft limits, and found that some natural systems including parts of coral reefs, wetlands, and polar and mountain ecosystems have already reached hard limits.