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Earth Day is an international day devoted to the planet, drawing attention to environmental protection, conservation and sustainability. Observed each year on 22 April, it sees around 1 billion people worldwide take action to raise awareness of the climate crisis and promote behavioural change.

The day also focuses on forests, oceans, freshwater systems, soils and biodiversity, which support food production, human health, economic resilience and livelihoods. Healthy ecosystems absorb carbon, reduce disaster risks and help communities adapt to a changing world.

Participation ranges from small activities such as planting gardens and picking up litter to volunteering, tree planting, ecological initiatives and protests. Campaigns in 2026 focus on civic mobilization, environmental literacy and democratic action through activities such as voter registration drives, teach-ins and town halls.

What is world earth day and why is it celebrated?

Earth Day is observed annually on 22 April to promote awareness about environmental challenges and encourage action to protect natural systems. It highlights the interconnectedness of ecosystems and human well-being, emphasizing conservation, sustainability and collective responsibility in addressing environmental degradation and climate change.

World earth day 2026 theme

The 2026 theme, ‘our power, our planet’, emphasizes human agency and collective action. It builds on earlier calls for clean energy and underscores the role of communities in driving solutions locally, even as broader policy responses fluctuate.

History of earth day: when and how it started

Earth Day began on 22 April 1970 in the US, when millions protested environmental degradation caused by industrial growth. Demonstrations took place across cities, including New York and Boston. The movement was driven by concerns over pollution and ecological damage and brought together diverse groups. It led to the creation of the Environmental Protection Agency and key environmental laws. The movement expanded globally in 1990, with participation from 141 countries, paving the way for international environmental agreements.

Significance of earth day in fighting climate change

Earth Day plays a crucial role in mobilizing action against climate change by promoting awareness, advocacy and participation. Scientific data shows rising global temperatures, with recent years among the warmest on record. Reports indicate the risk of severe warming without major energy transitions. Environmental risks continue to dominate global concerns, while natural ecosystems remain critical in absorbing carbon emissions. However, biodiversity loss and human-driven pressures threaten these systems, making collective action increasingly important.