Climate Change: The Defining Development Challenge of the Twenty-First Century

Introduction: Climate Change Beyond an Environmental Issue

The twenty-first century has witnessed unprecedented scientific advancement, economic growth, and technological innovation. Yet, alongside these achievements, humanity faces an existential challenge that transcends national boundaries—climate change. No longer confined to environmental discourse, climate change has evolved into a development challenge that influences economic growth, food security, public health, water availability, energy systems, and global peace. As the World Meteorological Organization observes, rising temperatures and increasing climate variability are becoming the "new normal," demanding that development policies integrate climate resilience at their core.

Understanding Climate Change and Its Scientific Basis

Climate change refers to long-term alterations in temperature and weather patterns, primarily driven by human-induced greenhouse gas emissions from fossil fuel combustion, industrialisation, deforestation, and unsustainable land-use practices. Unlike temporary weather fluctuations, climate change represents a structural transformation of the Earth's climate system, producing more frequent heatwaves, floods, droughts, cyclones, glacier retreat, and sea-level rise. The enhanced greenhouse effect has fundamentally altered the planet's energy balance, making climate risks increasingly measurable and policy-relevant.

Impact on Economic Growth and Development