Earth
Icing the atmosphere to combat global warming
Scientists propose geoengineering as a last option to tackle the effects of global warming

Climate scientists at NASA and the National Oceanic and Atmospheric Administration (NOAA) discussed the feasibility of injecting ice into the earth’s atmosphere to alter water vapor levels, to counter-act global warming. The paper was published in Science Advances.
Water vapor, like carbon dioxide, is a greenhouse gas. However, it’s vital to our ecosystem since it’s naturally added and removed from the atmosphere via the water cycle. By reducing water vapor content at a certain level, even the warming caused by the sudden increased solar radiation can be counter-acted. Water vapor’s heating effects are in part caused by a constant resupply of vapor in a ‘positive feedback’ loop.
Reducing water vapor is an option, said the researchers, in light of a climate emergency. However, geoengineering doesn’t have international approval from leading climate agencies yet, as the risks are still unknown or not known in sufficient detail.
Nonetheless, the scientists outlined a plan. Practically, they will have to inject 2 tons of ice a week releasing them from an altitude above 17 km. The idea is to have ice and relatively warmer air interact, causing vapor to lose heat, transforming to ice and fall. This would deplete the water vapor levels above the stratosphere. The net reduction in vapor levels can reduce the effects of global warming, akin to an equivalent five per cent reduction in levels of anthropogenic carbon dioxide.
However, Andrew Weaver, a researcher not involved in the story, threw caution. Geoengineering like this is likely to create cascading new problems, said Weaver, a climate scientist at the University of Victoria, Australia.
The research was supported by NASA’s Upper Atmospheric Composition program.
Earth
Guterres to WMO: ‘No Country Is Safe Without Early Warnings’
At WMO’s 75th anniversary, UN Chief António Guterres warned that no nation is safe from extreme weather — urging governments to fast-track early warning systems by 2027.

Declaring that “no country is safe from the devastating impacts of extreme weather,” UN Secretary-General António Guterres called for a global surge in early warning systems to protect lives, economies, and ecosystems from climate-fuelled disasters.
Speaking at the 75th anniversary of the World Meteorological Organization (WMO), Guterres hailed the agency as “a barometer of truth” and “a shining example of science supporting humanity.” It was his first address to the WMO, reflecting the agency’s central role in turning climate science into life-saving action.
“Without your rigorous modelling and forecasting, we would not know what lies ahead — or how to prepare for it,” he told delegates gathered at WMO headquarters in Geneva.
The occasion doubled as the midway checkpoint for the Early Warnings for All (EW4All) initiative, launched by Guterres in 2022 to ensure every person on Earth is protected by life-saving warning systems by 2027.
WMO Secretary-General Celeste Saulo issued a “Call to Action,” urging all countries to close early warning gaps through expanded observation networks, strengthened hydrological services, and community-level outreach. “Every dollar invested in early warning saves up to fifteen in disaster losses,” she said.
Saulo cautioned that despite major progress—108 countries now operate multi-hazard warning systems—the world’s poorest remain the least protected. Disaster mortality rates are six times higher in countries with limited early warning coverage.
A 75-Year Legacy of Science for Action
Marking 75 years since it became a UN specialized agency, WMO used its Extraordinary Congress to reaffirm global cooperation in weather, water, and climate monitoring.
President Abdulla al Mandous praised Guterres for embedding early warning systems into the international climate agenda: “Early warnings are now recognized at the highest levels as cost-effective, life-saving, and cross-cutting solutions that reduce risk and advance development,” he said.
Guterres urged three urgent priorities to achieve universal coverage: integrating early warnings across governance structures, boosting finance and debt relief for vulnerable nations, and aligning national climate plans to limit temperature rise to 1.5°C.
“Every life lost to disaster is one too many,” he said. “With science, solidarity, and political resolve, we can ensure a safer planet for all.”
COP30
Farmers Warn: The World Needs $443 Billion a Year to Protect Those Feeding Half of Humanity
A new global report reveals smallholder farmers need $443 billion annually to adapt to climate change—less than today’s harmful farm subsidies. As COP30 nears, farmer groups demand direct funding for resilience.

A new global analysis released ahead of COP30 warns that the world must mobilize at least US$443 billion each year to help smallholder farmers adapt to worsening climate impacts—nearly the same amount currently spent on subsidies that harm both people and the planet.
The report, released by Climate Focus for the Family Farmers for Climate Action (FFCA)—an alliance representing 95 million small-scale producers worldwide—reveals that only 0.36% of needed funds currently reach these farmers.
Smallholders, who farm less than 10 hectares each, produce half of the world’s food calories and sustain 2.5 billion livelihoods, yet face rising threats from droughts, floods, and storms. “This isn’t charity—it’s an investment in global food security,” said Elizabeth Nsimadala, President of the Eastern Africa Farmers Federation.
The Cost of Survival: Less Than a Daily Coffee
According to the report, the annual adaptation cost for a typical one-hectare farm is just US$953—or about US$2.19 a day—less than the price of a cup of coffee in Germany. Meanwhile, smallholders already spend 20–40% of their income on adaptation measures, totaling US$368 billion a year from their own pockets.
Investments would support vital measures like micro-irrigation systems, early warning networks, and climate-resilient seeds—steps proven to prevent devastation from saltwater intrusion in Vietnam’s Mekong Delta or drought crises across East Africa.
Dangerous Finance Gaps Leave Farmers Defenseless
Despite their crucial role, current global spending on smallholder adaptation reached only US$1.59 billion in 2021, a drop in the ocean compared to the estimated need. Bureaucratic barriers, limited access to rural banking, and restrictive loan conditions mean that small-scale farmers are frequently shut out of official climate finance systems.
A study cited in the report found that none of the 40 major GEF or GCF projects designed to assist small-scale producers sent funds directly to family farmers. Instead, farmers often rely on informal credit sources with crushing interest rates.
COP30: A Turning Point for Climate Justice
As the upcoming COP30 in Brazil puts adaptation at the centre of global negotiations, farmer-led groups are demanding a dedicated “Farmers Resiliency Fund” to ensure money flows directly to those growing the world’s food.
The Brazilian Presidency’s Action Agenda—which emphasizes sustainable agriculture and hunger eradication—has given hope for reform. However, questions remain over whether rich nations will double adaptation finance to US$40 billion by 2025 or commit to a long-term goal that includes
Earth
When the Floods Cleared the Skies, and Firecrackers Choked Them Again
Delhi’s air improved after floods cut stubble burning by 77%, but Diwali’s fireworks pushed PM2.5 to record highs — exposing India’s pollution paradox

Delhi’s toxic air returned this October in a troubling sequence of contrasts. For two weeks, the Indian capital breathed marginally cleaner air — not because of new policies or enforcement, but because nature intervened. Massive floods in Punjab and Haryana dramatically reduced stubble burning, cutting agricultural fires by more than 77%. But just as the air began to clear, the Diwali festival sent pollution levels soaring to their highest in five years.
Fresh analyses of satellite fire counts and ground-level pollution data reveal the fragile nature of Delhi’s air quality gains — and how quickly they can unravel when local emissions spike.
A Flood-Induced Experiment in Clean Air
From October 1–12, 2025, combined stubble-burning incidents in Punjab and Haryana dropped from 779 to just 175, according to new analysis by Climate Trends, a research-based consulting firm. The widespread monsoon flooding that year left farmlands waterlogged, delaying harvest cycles and making crop residue burning nearly impossible.
The results were immediate. Delhi’s average PM2.5 concentration fell by 15.5% compared to the same period in 2024 — from 60.79 µg/m³ to 51.48 µg/m³. The link between upwind agricultural fires and air quality in the National Capital Region became unmistakably clear.
“The floods served as an unplanned intervention, drastically lowering fire activity and proving how strongly stubble burning impacts Delhi’s air quality,” the report observed. In 2024, when fire activity was high, the day with the most burning (October 12) also recorded Delhi’s worst pollution. In 2025, as those fires disappeared, the capital’s skies briefly showed signs of recovery.
But experts caution that the improvement was relative, not absolute. Even with crop fires nearly wiped out, Delhi’s average PM2.5 remained above 50 µg/m³ — far exceeding the World Health Organization’s safe limit of 5 µg/m³. “This reveals a significant background load from vehicles, industries, and dust,” the analysis noted.
Then Came Diwali — and the Air Turned Grey Again
Just weeks later, the city’s respite vanished.
Data from the Central Pollution Control Board show PM2.5 levels leaping from 156.6 µg/m³ before Diwali to 488 µg/m³ after the festival — a threefold jump that made this year’s Diwali the most polluted in recent memory. The highest hourly concentrations, touching 675 µg/m³, were recorded late into the night of the celebrations.
“This year’s Diwali has proven to be even worse than before,” said Palak Balyan, Research Lead at Climate Trends, in a statement. “The data clearly show a sharp rise in pollution levels, with post-Diwali PM readings averaging around 488 compared to just 156.6 before the festival. Green crackers made no measurable difference compared to regular ones.”
Meteorological conditions compounded the damage. Calm winds, below 1 metre per second, and a nighttime temperature inversion trapped pollutants close to the surface. “It is most likely that the high concentration of PM2.5 is due to local emission of firecrackers,” explained Dr. S.K. Dhaka, Professor at Rajdhani College, University of Delhi. “The pollution is of local nature, not transported from other places.”
The Limits of Seasonal Fixes
The back-to-back contrasts of October 2025 expose the complexity of Delhi’s air pollution crisis — a cycle that oscillates between rural and urban sources, and between policy action and cultural inertia.
“The floods achieved what enforcement often struggles to do — a 77.5% drop in stubble burning,” noted the analysis. Yet, within weeks, those gains were erased by festival emissions and weak regulation.
For environmentalists, it was a reminder that neither short-term bans nor weather anomalies can substitute for long-term emission control. “It’s disheartening that even after years of witnessing the harmful effects of burning firecrackers, we continue to repeat the same mistake,” said Aarti Khosla, Founder and Director of Climate Trends. “This pollution severely impacts children, pregnant women, the elderly, and those who are unwell. I sincerely urge everyone to be more mindful and sensitive towards our environment.”
A Global Mirror
Delhi’s story resonates far beyond India. Across Asia, seasonal pollution spikes linked to agriculture and festivals remain entrenched. From rice stubble burning in Thailand and Vietnam to haze from forest fires in Indonesia, similar emissions patterns are repeatedly visible — and so are the lessons.
Temporary improvements, whether due to floods or lockdowns, underscore what is possible when emissions fall drastically. Yet, the persistence of “base pollution” from transport, industry, and energy use continues to keep air quality at unsafe levels year-round.
In that sense, 2025 offered a real-world experiment: when emissions from one sector (agriculture) dropped sharply, air quality improved almost immediately. But when another (fireworks and vehicles) spiked, the benefits evaporated just as fast.
Experts argue that India’s clean air strategy must move beyond reactive bans and seasonal blame games. The 2025 data underline the need for coordinated, year-round emission control — from crop management in rural states to mobility and energy transitions in cities.
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