global warming for 4 September 2025

Global Warming is the most serious environmental problem of present times. It is the rise in Earth’s average temperature, caused due to human actions like burning of fossil fuels, destruction of forests and huge industrial operations. This impact creates a ripple effect on the ecosystem, human health and global economy. In this article, we are going to cover global warming, its causes, its effects and efforts to conserve the environment. 

Global Warming

Global warming is defined as the long-term rise in Earth’s average surface temperature, which is mainly linked to human activities. It is closely associated with the phenomenon of climate change, as the emission of greenhouse gases (GHGs) into the atmosphere traps heat and disrupts natural climate systems. While global warming occurs due to natural reasons, such as solar cycles or volcanic eruptions, high temperature warming witnessed in recent centuries is primarily the result of human actions like excessive burning of coal, oil, and natural gas, widespread deforestation, and industrial pollution.

Global Warming Causes

The causes of global warming are divided into natural factors and human-induced factors. While natural causes have always influenced the Earth’s climate over thousands of years, human interference has accelerated the process at an unprecedented pace, leading to severe environmental consequences.

Global Warming due to Natural Causes

1. Solar Radiation Variations : The Sun’s energy output is not constant. It fluctuates, which leads to small changes in Earth’s temperature. Rare but stronger solar activity can slightly increase global temperatures.
2. Volcanic Activity:  Major volcanic eruptions release gases and ash into the atmosphere. While aerosols from eruptions temporarily cool the Earth by blocking sunlight, the carbon dioxide emitted contributes to long-term warming.
3. Earth’s Orbital Changes: The tilt and orbit of the Earth, also known as Milankovitch cycles, affect how much solar energy the Earth receives. Over thousands of years, these natural shifts can cause warming or cooling phases.

Global Warming Caused due to Human Activity

Although natural causes play a role, the main reason for global warming is human activity. Industrialization, urbanization, and unsustainable agricultural practices are releasing high amounts of GHGs into the atmosphere.

1. Burning of Fossil Fuels: Coal, oil, and natural gas used for electricity, transportation, and industries emit huge quantities of CO₂. Fossil fuel extraction and use also contribute to methane (CH₄) emissions.
2. Deforestation: Trees act as carbon sinks, absorbing CO₂. Cutting down forests for farming, urban settlements, or timber reduces this absorption capacity, increasing atmospheric CO₂ levels.
   
   
3. Industrial Activities: Manufacturing, cement production, and mining release CO₂ and more harmful gases like hydrofluorocarbons (HFCs) and sulphur hexafluoride (SF₆), which are far stronger than carbon dioxide in trapping heat.
4. Agriculture: Livestock farming produces methane, while the use of synthetic fertilizers releases nitrous oxide, another powerful greenhouse gas. 

Global Warming Potential 

GWP helps measure how much heat one ton of a gas traps in the atmosphere compared to one ton of carbon dioxide, usually over a 100-year period. This measurement helps policymakers prioritize which gases to target for reduction.

Greenhouse Gas (GHG)	Atmospheric Lifetime (Years)	Global Warming Potential (GWP)	Primary Current Sources
Carbon Dioxide (CO₂)	50–200	1	Fossil fuel use, land use, cement
Methane (CH₄)	12 + 3	21	Fossil fuel use, agriculture
Nitrous Oxide (N₂O)	120	320	Agriculture, one-third anthropogenic
Hydrofluorocarbons	1.5–209	150–11,700	Alternatives to Ozone Depleting Substances
Perfluorocarbons	2,600–50,000	6,500–9,200	Aluminium production, semiconductors
Sulphur Hexafluoride (SF₆)	3,200	23,900	Electric power transmission, magnesium industry

Global Warming Effects 

Global Warming not only affects the natural environment but also human life, economy and health. The effects of global warming include:

Environmental Effects

• Rising Global Temperatures: Earth’s average temperature has risen by about 1.1°C since pre-industrial times. If unchecked, it could rise further, leading to disrupted weather cycles and strained water resources.
• Melting Ice and Rising Seas: Arctic and Antarctic ice is melting rapidly, causing sea levels to rise. By 2100, sea levels could increase by 0.6 to 1.1 meters, flooding coastal cities and contaminating freshwater sources.
• Extreme Weather: Stronger hurricanes, more intense floods, severe droughts, and frequent heatwaves are all linked to warming. These events damage infrastructure, reduce food supplies, and increase disaster risks.

Effects on Ecosystems

• Biodiversity Loss: Rising temperatures threaten species unable to adapt quickly. Coral reefs face bleaching, polar bears struggle with melting ice, and many amphibians and birds risk extinction.
• Impact on Agriculture and Vegetation: Crops like wheat, maize, and rice are vulnerable to heat and unpredictable rainfall. Changing growing seasons and more frequent droughts pose food security risks.

Socio-Economic Effects

• Food Security and Poverty: Reduced agricultural yields cause higher food prices, malnutrition, and poverty, especially in developing nations dependent on farming.
• Economic Strain: Countries reliant on agriculture, fisheries, and tourism face financial losses. Climate disasters also damage infrastructure and burden government budgets.

Human Health Effects

• Spread of Diseases: Warmer climates expand the reach of vector-borne diseases like malaria, dengue, and Zika. Waterborne diseases also increase due to poor water quality.
• Heat-Related Illnesses: Heatwaves cause dehydration, strokes, and heart stress, particularly in elderly and vulnerable populations. Urban heat islands make city dwellers more exposed.

Global Warming Controlling Solutions

In order to control global warming, GHS emissions have to be reduced and adaptation measures have to be taken up. Global warming 

Tackling global warming requires global cooperation and local actions. Both mitigation (reducing GHG emissions) and adaptation (adjusting to unavoidable impacts) are necessary.

Reducing Greenhouse Gas Emissions

1. Renewable Energy: Shifting to solar, wind, and hydropower reduces dependence on coal and oil. Countries like Germany and China lead, while India is boosting solar capacity.
2. Energy Efficiency: Using energy-efficient appliances, better building insulation, and public transport helps cut emissions. Electric vehicles powered by renewables offer major potential.
3. Carbon Capture: Carbon Capture and Storage (CCS) technologies trap CO₂ from industries and store it underground. Projects in Norway and Canada showcase its possibilities.

Promoting Sustainable Agriculture and Reforestation

1. Sustainable Farming: Practices like organic farming, crop rotation, and precision agriculture reduce methane and nitrous oxide emissions.
2. Reforestation and Afforestation: Planting and restoring forests enhances carbon absorption. Initiatives like Pakistan’s Billion Tree Tsunami and India’s Green India Mission are examples.

International Efforts to Combat Global Warming

• Paris Agreement (2015): Nearly 200 nations pledged to keep warming below 2°C and aim for 1.5°C. Countries submit and update climate action plans (NDCs) every five years.
• Other Global Initiatives: The UNFCCC, Kyoto Protocol, COP meetings, and the Green Climate Fund are vital platforms for cooperation. Businesses also join through sustainability pledges like the Carbon Disclosure Project.

Global Warming Adaptation Strategies

1. Building Resilient Communities: Developing nations, most vulnerable to climate change, need disaster risk reduction programs, water management, and climate-smart farming. Bangladesh’s floating farms are an example.
2. Climate-Smart Infrastructure: Building flood barriers, sustainable transport systems, and green buildings reduces risks. Urban green spaces, permeable pavements, and rooftop gardens help fight heat and flooding.