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\t\t\t\t\t\t22\/04\/2026<\/span> Happy Earth Day, 22 April \u2013 a global call to act and protect our planet. At the European Space Agency, that action begins in orbit, where satellites deliver a continuous, global view of Earth and track environmental change. Working with partners, ESA turns this stream of data into actionable information, helping governments and communities respond faster and more effectively to climate-driven risks.<\/p>\n Here are two examples of how space technology is being used to anticipate threats to safeguard food security and public health.<\/p>\n<\/div>\n \nUsing satellite data to prevent locust swarms<\/b> Speed is everything. The most effective control targets wingless juveniles, known as hoppers, before they fly. Traditional ground surveys, however, are slow, labour-intensive and often limited by remote or insecure terrain, allowing outbreaks to escalate.<\/p>\n As part of its commitment to Earth Action, ESA is helping to address this through its FutureEO programme by having co-developed an Earth observation-driven early warning and forecasting system with VITO Remote Sensing, the Intergovernmental Authority of Development (IGAD)\u00a0and the World Bank.<\/p>\n<\/p><\/div>\n Powered by Copernicus Sentinel satellite data and delivered through the East Africa Hazards Watch platform, it provides region-wide, location-specific alerts every 10 days \u2013 helping authorities prioritise interventions and support farmers facing crop losses.<\/p>\n The results are striking. Outbreaks are now less severe, and targeted action has sharply reduced insecticide use \u2013 cutting costs and environmental harm. In Ethiopia, annual use has dropped to around 6000 litres, compared to more than 1.1 million litres during the major outbreaks between 2019 and 2021.<\/p>\n High-resolution imagery from Copernicus Sentinel-2 and ESA\u2019s WorldCover project maps vegetation growth and crop damage, supporting insurance claims, while Copernicus Sentinel-3\u2019s near-daily coverage tracks rapid vegetation change linked to rainfall \u2013 one of the key drivers of locust breeding.<\/p>\n At the core is MaxEnt, a statistical model developed by VITO that pinpoints likely breeding zones and egg-laying windows by combining soil, elevation and weather data.<\/p>\n Built on open data and open software, the system is freely available \u2013 and is proving a powerful tool in protecting vulnerable regions from climate-driven pest outbreaks.<\/p>\n<\/p><\/div>\n \nEarly warning tool helps fight mosquito-borne diseases<\/b> The need is urgent. Dengue alone puts around half the world\u2019s population at risk, with an estimated 100\u2013400 million infections each year, according to the World Health Organization. With better foresight, countries can act earlier \u2013 reducing illness and deaths while easing the strain on already stretched health systems, especially in the most vulnerable regions.<\/p>\n At the heart of this effort is the Disease Incidence and Resource Estimator (DIRE), developed by ESA\u2019s \u03a6\u2011lab for UNICEF. DIRE combines machine learning with satellite\u2011derived environmental data to model how climate and geography influence disease transmission and predict imminent disease epidemics.<\/p>\n<\/p><\/div>\n By turning complex climate and health data into visual risk maps and actionable guidance, DIRE helps health authorities identify high\u2011risk areas early, prepare clinics, mobilise staff and target vaccines and fumigation resources where they will have the greatest impact.<\/p>\n Pilots in Brazil and Peru \u2013 both heavily affected by dengue \u2013 show the model outperforms previous prediction methods. The approach was recognised as one of UNICEF\u2019s top research initiatives in 2022 and named among UNESCO\u2019s Top 100 AI solutions supporting the Sustainable Development Goals.<\/p>\n By transforming satellite data into early, targeted action, DIRE demonstrates how space technology and artificial intelligence are already helping protect public health and save lives on the ground.<\/p>\n<\/p><\/div>\n \nEarth Action<\/b> As the climate crisis intensifies, the ability to anticipate risks and respond early is critical to building resilience worldwide. By combining cutting-edge satellite technology with strong partnerships and open data, ESA is helping turn insight into impact \u2013 empowering communities not just to react to a changing planet, but to stay one step ahead.<\/p>\n ESA\u2019s Director of Earth Observation Programmes, Simonetta Cheli, said, \u201cThis Earth Day, we are reminded that solid evidence is the foundation of effective action to protect our planet. ESA will continue to observe the Earth, strengthen scientific understanding and ensure that space-based knowledge informs policy, resilience and sustainability for the benefit of society.\u201d<\/p>\n<\/p><\/div>\n
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Desert locust outbreaks pose a severe threat to food security across East Africa, with swarms capable of devastating crops within hours. Today, satellite-based Earth observation is changing that \u2013 enabling authorities to detect risk early, predict breeding conditions and act before swarms ever take flight.<\/p>\n
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As climate change accelerates the spread of mosquito-borne diseases, satellite-based early warning systems are giving health authorities a critical head start. By fusing Earth observation data with machine learning, ESA and UNICEF have developed a digital platform that helps countries predict, prepare for and respond to dengue and malaria outbreaks weeks before they escalate.<\/p>\n
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From safeguarding harvests to strengthening public health, these examples show how data from space are no longer just about observing change \u2013 it is about driving timely, targeted action on the ground.<\/p>\n