Why species go extinct usually involves a chain of pressures, including habitat loss, exploitation, invasive species, climate change and small populations.
Youth climate action includes activism, education, careers, community projects and formal participation in the institutions shaping climate policy.
The role of the United Nations in climate change is to coordinate treaties, negotiations, reporting, science and finance—not govern national climate policy.
Climate change and poverty interact through housing, livelihoods, health, infrastructure and recovery capacity, leaving poorer households with fewer options after shocks.
Climate justice asks who caused climate change, who suffers most, who should pay for action and how costs and benefits can be shared fairly.
The role of government in climate action includes setting rules, investing in infrastructure, managing climate risks and turning targets into policy.
The Kyoto Protocol created binding emissions targets, carbon markets and compliance rules that shaped the global climate system before Paris.
International climate cooperation links national action through shared targets, finance, technology, transparency and rules for a shared atmosphere.
The urban heat island effect makes built-up areas hotter. Learn its causes, health impacts and how trees, cool roofs and better urban design can help.
The carbon footprint of the internet comes from data centres, networks, devices, electricity and hardware—not a fixed carbon cost for every click.
The power of consumer choices is real but limited by price, infrastructure and available options. Learn where individual action can make the biggest difference.
Plant-based diets and the environment are closely linked, especially when high-impact ruminant meat is replaced with nutritious plant foods.
Sustainable eating combines healthy nutrition with lower environmental impact, affordability, less food waste and practical food choices.
The environmental impact of meat production includes methane, land, feed, water and manure. Learn why species and farming systems change the footprint.
Food waste exceeds 1 billion tonnes globally. Learn its causes, environmental impact, difference from food loss and why prevention matters most.
Sustainable agriculture balances food production with soil, water, biodiversity, climate, farm income and long-term resilience.
Ozone layer recovery is underway as harmful chemicals decline, but the Antarctic ozone hole remains large and full recovery will take decades.
The global water crisis is about access, quality, scarcity and management—not Earth running out of water. Here’s why billions still lack security.
Water scarcity is an imbalance between usable water and demand. Learn how drought, farming, groundwater, pollution and climate change intensify it.
Plastic pollution is more than litter. Learn how production, short-lived products, microplastics, weak waste systems and recycling limits created a global pollution crisis—and wha…
Reforestation restores lost forests through natural recovery or planting, helping biodiversity, climate, soils and landscapes recover.
Afforestation creates new forests on non-forested land, but its climate, biodiversity and water benefits depend on choosing the right land and trees.
Why wetlands matter for flood control, clean water, biodiversity and climate—and why protecting their natural hydrology is essential.
Pollinator species such as bees, butterflies, birds and bats help flowering plants reproduce, support crop yields and sustain biodiversity.
Earth has experienced five catastrophic mass extinctions in the fossil record. Today species are disappearing unusually fast, largely because of human pressures. Whether that alre…
Extinction is the final stage of a longer decline. Habitat loss, overexploitation, invasive species, pollution, climate change and disease can reduce populations until ordinary ba…
Biodiversity is the variety within genes, species and ecosystems that keeps living systems functioning. Its decline is not simply about losing rare wildlife; it can weaken ecologi…
Flooding is a natural part of many river and coastal systems. Disaster begins when water intersects with exposed people, poorly planned development and vulnerable infrastructure -…
Heatwaves rarely leave the dramatic visual destruction associated with storms or earthquakes. Yet prolonged extreme heat can overwhelm the human body, strain cities and infrastruc…
Drought usually begins quietly. A rainfall deficit becomes dry soil, falling river flows and stressed reservoirs, while heat, water demand and land management determine whether a…
Rising seas, droughts, floods and storms can push people from their homes, but calling everyone affected a “climate refugee” obscures a complicated reality: most remain inside the…
India’s heatwaves are no longer just seasonal weather events; they are becoming a stress test for cities, workers, hospitals, power grids and water systems. As temperatures rise a…
