Comprehensive Study Notes on Climate Change and Pakistan
Natural and Human Causes of Climate Change
Climate change refers to long-term shifts in the average weather patterns of a place. The underlying mechanism driving recent climatic shifts is the enhanced greenhouse effect, wherein greenhouse gases such as carbon dioxide (), methane (), and nitrous oxide () accumulate in the lower atmosphere, trapping heat that would otherwise escape into space as outgoing infrared radiation. As global temperatures rise above natural baselines, critical regional weather systems become unpredictable. In South Asia, this directly disrupts Pakistan's summer monsoon and the seasonal glacial meltwater that feeds the Indus River system.
Natural processes have altered Earth's climate throughout geological history, operating over cycles of tens of thousands of years. Orbital changes, known as Milankovitch cycles, involve small variations in the shape of Earth's orbit around the Sun and the tilt of its axis, which historical records show ranges between and , currently standing at . These variations alter the distribution of solar energy reaching the Earth's surface, gradually driving ice age cycles. Past Milankovitch cycles directly shaped the river valleys now occupied by the Indus system by expanding and contracting glaciers in the Karakoram and Hindu Kush ranges. However, these orbital shifts occur too slowly to account for the rapid warming observed since industrialisation in the mid-nineteenth century.
Other natural factors include sunspots and solar activity, as well as volcanic eruptions. Sunspots are dark patches on the surface of the Sun associated with increased solar energy output that can temporarily elevate temperatures on Earth. Despite this phenomenon, solar output has remained stable since the mid-twentieth century, meaning it cannot explain recent global warming. For example, glaciers in Nepal's Himalayas continue to retreat despite low solar activity. Volcanic eruptions inject vast amounts of ash and sulphur dioxide into the upper atmosphere, reflecting sunlight and causing short-term global cooling. The eruption of Mount Pinatubo briefly disrupted South Asian monsoons, illustrating how volcanic activity alters regional weather temporarily without causing long-term climate warming, especially since volcanoes release far less carbon dioxide than human activities.
Human activities since industrialisation have driven concentrations of greenhouse gases far beyond natural variation levels. Carbon dioxide () is primarily released through the combustion of fossil fuels—coal, oil, and natural gas—for transport, electricity generation, and industrial operations, overwhelming natural carbon sinks. In Pakistan, coal-fired power generation plants such as those in Sahiwal and Port Qasim produce over of electricity, making the energy sector the primary source of carbon dioxide emissions nationwide.
Rapid urbanisation further accelerates warming through the urban heat island effect. As expanding cities replace natural vegetation with thermal-retaining concrete and asphalt, urban centers absorb and store significant heat compared to surrounding rural regions. Major Pakistani cities such as Karachi and Lahore experience urban heat island temperatures that are to higher than nearby rural areas, significantly raising energy demand for air conditioning.
Deforestation eliminates natural carbon sinks that absorb carbon dioxide through photosynthesis, while the burning or decomposition of cleared biomass releases stored carbon back into the atmosphere. In Pakistan's Khyber Pakhtunkhwa province, specifically within the Swat and Chitral districts, forest cover has been reduced by over since the . This loss removes crucial carbon sinks while compounding risks of severe soil erosion and rapid hillside flooding.
Agricultural practices represent another primary emission source across South Asia due to the region's strong agrarian economy. Methane () is emitted through enteric fermentation in livestock digestive systems and organic matter decomposition in flooded paddy fields. Nitrous oxide () is emitted from chemical fertilizers and industrial processes. Over a century-long timeframe, nitrous oxide is approximately more potent as a greenhouse gas than carbon dioxide.
A major structural issue in global climate dynamics is Pakistan's Climate Paradox. Combined, Pakistan, Bangladesh, Nepal, and Sri Lanka contribute less than of total global greenhouse gas emissions, yet they remain among the most climate-vulnerable nations globally. Pakistan's vulnerability stems from three structural realities: approximately of its freshwater originates from temperature-sensitive glacial meltwater and monsoon rainfall, large population centers reside on directly exposed floodplains, and the agricultural sector employs nearly of the national workforce with zero institutional buffer against shifting rainfall patterns.
Environmental and Socio-Economic Consequences for Pakistan
Pakistan sits at the junction of the Karakoram, Hindu Kush, and Himalaya mountain ranges, housing over glaciers—more than any other region on Earth outside the polar zones. The Karakoram range represents one of the most heavily glaciated regions globally beyond the Arctic and Antarctic. Rising global temperatures accelerate glacial retreat and melting. Short-term impacts include a heightened risk of glacial lake outburst floods (GLOFs), which severely damage local infrastructure, roads, bridges, and settlements. Long-term impacts involve the permanent reduction of dry-season river flows, threatening agricultural, industrial, and municipal water supplies.
Pakistan is officially classified as a water-stressed country, with per capita water availability declining drastically from in to below , crossing the World Bank's threshold for water scarcity. Between and , GLOF events in Pakistan increased fivefold. The National Disaster Management Authority (NDMA) estimates that each individual glacial lake outburst directly impacts people across Gilgit-Baltistan and Khyber Pakhtunkhwa.
Sea level rise along the Makran coast and the Indus Delta is causing severe coastal environmental destruction. Seawater has intruded up to inland across Sindh, contaminating freshwater aquifers and ruining millions of acres of prime agricultural farmland with high salinity. Severe coastal flooding threatens settlements in Karachi, Thatta, and Badin, while over of the Indus Delta's natural mangrove cover has been destroyed, stripping the coast of its natural storm barrier.
Extreme weather events are growing in frequency and severity across Pakistan. Hotter, drier conditions in northern forests have increased wildfire hazards; in alone, Khyber Pakhtunkhwa recorded over wildfires that destroyed vast forest ecosystems. Higher sea surface temperatures in the Arabian Sea intensify tropical cyclones, demonstrated by Cyclone Biparjoy in , which caused severe displacement and damage across Sindh and Balochistan. The Intergovernmental Panel on Climate Change (IPCC) projects an increasing proportion of intense cyclones in the region as ocean waters continue to warm.
Monsoon rainfall has become increasingly intense and variable, causing riverine, flash, and urban floods. Extreme heatwaves are becoming longer and more frequent, with record temperatures approaching recorded in Jacobabad and Sibi. These heatwaves decrease crop yields, increase incidence of heat-related illness, and overload national electrical power grids beyond capacity. Cloudbursts and intense localized rainfall in northern mountain zones trigger destructive flash floods and landslides, while urban centers like Karachi and Lahore suffer frequent urban flooding as heavy rainfall overwhelms municipal drainage infrastructure.
The human and economic impacts of climate change in Pakistan are catastrophic across multiple sectors. Public health suffers from widespread malnutrition due to reduced agricultural yields, alongside waterborne disease outbreaks such as cholera and typhoid following flood events. Warmer baseline temperatures expand vector habitats for mosquitoes, escalating transmission of dengue and malaria.
Physical infrastructure and housing face recurrent destruction from climate hazards. The severe floods of displaced approximately people, causing widespread destruction of homes, schools, healthcare facilities, roads, and bridges, creating massive reconstruction costs and economic disruption. Crucial national industries face severe supply shortages; for instance, declining domestic cotton production directly disrupts textile manufacturing—Pakistan's primary export sector—dampening economic growth and straining public financial reserves.
National and International Policy Frameworks
Given that Pakistan contributes under of global greenhouse gas emissions yet suffers extreme climate impacts, national policy prioritizes adaptation strategies, international support, climate justice, and loss-and-damage compensation over pure emission mitigation. Over recent decades, Pakistan has developed structured national plans and aligned with international environmental agreements to address these growing vulnerabilities.
Pakistan joined international mitigation initiatives through the Kyoto Protocol in , leveraging the Clean Development Mechanism (CDM) to attract foreign investment for small-scale hydropower generation and industrial energy efficiency projects across Punjab and Sindh. In , Pakistan established its first National Climate Change Policy, formally recognizing adaptation as a core national strategy across water, agriculture, forestry, energy, and disaster management sectors, leading to the creation of dedicated climate units at the provincial level.
Pakistan updated its National Climate Change Policy in to reinforce adaptation frameworks, disaster risk reduction, ecosystem conservation, and low-carbon growth, aligning national action with global climate commitments. Under the Paris Agreement of the United Nations Framework Convention on Climate Change (UNFCCC), Pakistan regularly submits Nationally Determined Contributions (NDCs) outlining its national targets for emission reduction and climate adaptation measures.
In , Pakistan enacted its National Adaptation Plan, which translates high-level climate commitments into localized structural actions. The plan targets flood risk reduction, agricultural resilience, water management, ecosystem protection, and livelihood security, explicitly identifying priority sectors and geographical zones. Additionally, the Federal Flood Commission oversees the National Flood Protection Plan, which upgrades flood defences, strengthens river flow monitoring, improves early warning systems, and enforces safer land-use zoning in high-risk floodplains.
At the international level, Pakistan actively participates in Conference of the Parties (COP) climate summits to advocate for stronger mitigation action from major emitting nations and dedicated financial support for vulnerable countries. At COP27 in , Pakistan played a leading diplomatic role in championing loss-and-damage compensation, directly contributing to international negotiations that established the global Loss and Damage Fund.
Mitigation Strategies in Pakistan
Mitigation strategies focus on limiting greenhouse gas emissions and strengthening natural carbon sinks—ecosystems such as forests that absorb atmospheric carbon dioxide. Pakistan's mitigation portfolio focuses on three core pillars: expanding national forest cover, transitioning the power grid toward renewable energy, and lowering emissions from transport and industry.
To expand forest carbon sinks, Pakistan launched the Ten Billion Tree Tsunami Programme. This massive afforestation and reforestation effort restores degraded ecosystems, plants trees along riverbanks, and expands urban green cover. By expanding forest biomass, the programme sequesters atmospheric carbon dioxide, reduces soil erosion, slows surface runoff to mitigate flooding, and restores degraded wildlife habitats.
In the power sector, Pakistan aims to generate of its electricity from renewable energy sources by , incorporating solar, wind, and hydroelectric power while halting new power projects reliant on imported coal. Major policy frameworks supporting this transition include the Alternative and Renewable Energy Policy (AREP) of and the National Solar Energy Project, designed to systematically decrease carbon dioxide emissions from electricity generation.
To reduce emissions from transport and industry, the government introduced the National Electric Vehicle (EV) Policy, which targets shifting of all vehicles in the country to electric power by . This transition aims to reduce long-term fossil fuel consumption and urban air pollution. Furthermore, Pakistan has committed to international methane reduction efforts under the Global Methane Pledge, aiming to support the target of reducing global methane emissions by at least below levels by the year 2030$.\n\n# Adaptation Strategies and Community Resilience\n\nBecause agriculture feeds a national population exceeding 230\,\text{million}40\% of the labor force, building agricultural resilience against climate stress is a critical national objective. Pakistan is pursuing three complementary agricultural adaptation strategies simultaneously: crop resilience research, improved water management, and financial risk protection.\n\nThe Pakistan Agricultural Research Council leads research and development efforts to breed and distribute new varieties of staple crops, including wheat, rice, and sugarcane. These crop strains are specifically engineered to be heat-resistant, drought-tolerant, and high-yielding under environmental stress, progressively replacing older crop varieties that fail under volatile weather patterns.\n\nWater conservation in agriculture is guided by the National Water Policy of 2018$$, which promotes the adoption of high-efficiency irrigation systems such as drip and sprinkler irrigation alongside rainwater harvesting techniques. These practices minimize water loss and protect agricultural production during severe droughts, which is vital in the arid farming belts of Punjab and Sindh where groundwater extraction has caused deep water table declines.
To protect farming communities from climate shocks, formal crop insurance schemes are being established nationwide. These insurance programs compensate farmers for crop losses caused by severe flooding or prolonged droughts, stabilizing rural livelihoods, preventing severe financial insolvency, and maintaining long-term national food security.
Flood and cyclone risk management centers on structural protection and early warning capabilities. The Pakistan Meteorological Department (PMD) has upgraded its meteorological forecasting and early warning systems to give vulnerable communities adequate lead time for evacuation and protection. Structural interventions include constructing and upgrading flood embankments, river dykes, and small retention dams to safeguard rural farmland and urban centers from catastrophic overflow.
A primary nature-based adaptation initiative is the Recharge Pakistan Project, led by WWF-Pakistan in collaboration with the Ministry of Climate Change, the provincial irrigation departments of Sindh and Punjab, the Pakistan Meteorological Department, and provincial disaster management authorities. Operating across the Indus River floodplains, the Indus Delta, and riverine wetland zones in Thatta, Badin, Dadu, and Jacobabad, the project uses nature-based solutions to reduce flooding, retain excess floodwater, and recharge underlying aquifers.
The Recharge Pakistan Project relies on five core operational mechanisms: restoring wetlands to hold and slow floodwaters; reconnecting rivers to natural floodplains so floodwaters disperse safely across non-populated land; enhancing groundwater recharge so water infiltrates into depleted aquifers used for drinking and irrigation; improving natural surface drainage to regulate runoff speed; and directly engaging local communities in planning, implementation, and long-term ecosystem management.