Climate Basic

Climate change refers to long-term changes in the Earth's climate, including changes in temperature, rainfall, wind patterns, and the frequency or intensity of extreme weather events. While the Earth's climate has changed naturally throughout its history, human activities are now the main driver of the rapid climate change observed today.

Climate change affects ecosystems, agriculture, water resources, human health, livelihoods, infrastructure, and economic development. For countries such as Afghanistan, understanding climate change is particularly important because many communities depend directly on natural resources such as water, land, forests, and agricultural systems.

What Is Climate?

Climate describes the average pattern of weather in a particular place over a long period of time, usually several decades.

Climate includes factors such as:

• Average temperature

• Rainfall and snowfall

• Wind patterns

• Humidity

• Seasonal variations

• Frequency of extreme weather events

For example, Afghanistan has a generally dry and semi-arid climate, but climate conditions vary considerably between mountainous areas, valleys, plains, and other regions.

What Is Climate Change?

Climate change means a long-term shift in the Earth's climate patterns.

These changes can include:

• Rising average temperatures

• Changes in rainfall patterns

• More frequent or intense heatwaves

• Changes in drought conditions

• Changes in snow and glacier patterns

• Increased risks from floods and other extreme events

• Changes in ecosystems and biodiversity

• Impacts on agriculture and food production

• Changes in water availability

Climate change does not mean that every location becomes warmer every day. Instead, it refers to long-term changes in climate patterns.

Weather vs. Climate

Weather and climate are related, but they are not the same thing.

A useful way to remember the difference is:

Weather describes what is happening now or over a short period, while climate describes what normally happens over a much longer period.

What Causes Climate Change?

Climate change can result from both natural processes and human activities. However, the rapid warming observed in recent decades is primarily caused by human activities that increase the concentration of greenhouse gases in the atmosphere.

Major human-related causes include:

1. Burning Fossil Fuels

Coal, oil, and natural gas are widely used for electricity, transportation, heating, and industry. Burning these fuels releases large amounts of carbon dioxide (CO₂) into the atmosphere.

2. Deforestation and Land-Use Change

Forests absorb carbon dioxide from the atmosphere. When forests are cleared or degraded, stored carbon can be released and the ability of ecosystems to absorb carbon dioxide is reduced.

3. Agriculture

Agricultural activities can produce greenhouse gases such as methane (CH₄) and nitrous oxide (N₂O). Livestock, rice production, fertilizer use, and manure management are among the activities that can contribute to these emissions.

4. Industrial Activities

Industrial processes can release greenhouse gases directly or indirectly through energy consumption and the production of materials such as cement and chemicals.

5. Waste

Waste decomposition can produce methane, particularly when organic waste is disposed of in poorly managed landfills.

What Are Greenhouse Gases?

Greenhouse gases are gases in the atmosphere that absorb and re-emit heat. They help keep the Earth warm enough to support life, but increasing concentrations of these gases strengthen the greenhouse effect and contribute to global warming.

Important greenhouse gases include:

The natural greenhouse effect is essential for life. The problem is the additional warming caused by the increasing concentration of greenhouse gases resulting from human activities.

Human Activities and Climate Change

Modern societies depend on energy, transportation, agriculture, buildings, industries, and natural resources. Many of these activities currently involve processes that release greenhouse gases.

The relationship can be simplified as:

Human Activities → Greenhouse Gas Emissions → Increased Atmospheric Concentrations → Additional Warming → Climate Change

Reducing greenhouse gas emissions and protecting natural systems that absorb carbon are therefore important parts of addressing climate change.

Impacts of Climate Change

Climate change can affect both natural systems and human societies.

Common impacts include:

• Rising temperatures

• Changing precipitation patterns

• Increased drought risks

• Flooding and extreme rainfall

• Melting snow and glaciers

• Water scarcity

• Ecosystem degradation

• Biodiversity loss

• Reduced agricultural productivity

• Food insecurity

• Health risks

• Damage to infrastructure

• Impacts on livelihoods

• Displacement and migration

The effects are not the same everywhere. Climate impacts depend on local environmental conditions, economic systems, infrastructure, social vulnerability, and the ability of communities and institutions to adapt.

Climate Change in Afghanistan

Afghanistan is highly vulnerable to climate-related risks. The country's dependence on rain-fed agriculture, limited water resources, environmental degradation, and exposure to hazards increases the importance of climate resilience.

Climate-related challenges relevant to Afghanistan include:

• Drought and water scarcity

• Floods and flash floods

• Extreme temperatures and heatwaves

• Changes in rainfall and snowfall

• Changes in snowpack and glacier conditions

• Land degradation and desertification

• Ecosystem degradation

• Agricultural and livestock impacts

• Food and livelihood insecurity

• Risks to vulnerable communities

Climate change can also interact with existing development challenges. For example, water scarcity can affect agriculture and livelihoods, while extreme weather events can damage infrastructure and increase pressure on already vulnerable communities.

Key Climate Nexus for Afghanistan

Climate change is connected to many sectors:

Climate Change Adaptation

Adaptation means adjusting to actual or expected climate impacts in order to reduce harm, manage risks, and take advantage of potential opportunities.

Examples of adaptation include:

• Improving water management

• Developing drought-resilient agricultural practices

• Strengthening early warning systems

• Improving flood preparedness

• Protecting ecosystems

• Improving climate-resilient infrastructure

• Developing climate-informed agricultural planning

• Strengthening community preparedness

• Improving access to climate information

Adaptation is particularly important for communities and countries that are already experiencing climate-related impacts.

Climate Change Mitigation

Mitigation means reducing greenhouse gas emissions or increasing the amount of greenhouse gases removed from the atmosphere.

Examples include:

• Increasing renewable energy use

• Improving energy efficiency

• Reducing fossil fuel consumption

• Protecting and restoring forests

• Improving sustainable land management

• Reducing methane emissions

• Improving waste management

• Promoting low-carbon transportation

Adaptation and mitigation are different but complementary approaches.

Why Climate Knowledge Matters

Reliable climate knowledge helps individuals, communities, organizations, and governments make better decisions.

Climate information can support:

• Evidence-informed policy development

• Disaster risk reduction

• Agricultural planning

• Water-resource management

• Infrastructure planning

• Environmental protection

• Climate finance access

• Education and research

• Community preparedness

• Sustainable development

For Afghanistan, access to credible, organized, and locally relevant climate information is particularly important.

What Can Individuals and Organizations Do?

Everyone has a role to play in responding to climate change.

Individuals can:

• Reduce unnecessary energy consumption

• Use resources efficiently

• Reduce waste

• Protect trees and natural ecosystems

• Learn about local climate risks

• Support sustainable practices

• Share reliable climate information

Organizations and institutions can:

• Integrate climate risks into planning

• Improve environmental management

• Strengthen climate-resilient programmes

• Use climate data in decision-making

• Support education and capacity building

• Promote renewable energy and energy efficiency

• Collaborate on climate adaptation and mitigation

Key Climate Change Terms

Key Message

Climate change is not only an environmental issue. It is also connected to water, agriculture, energy, health, livelihoods, ecosystems, disaster risk, economic development, and social resilience.

Understanding these connections is essential for developing effective responses.

CENA brings together climate knowledge, Afghanistan-specific information, practical learning resources, policies, reports, and opportunities for knowledge exchange to help users move from climate knowledge to informed climate action.