The planet has already warmed significantly since the pre-industrial era. Even a small rise in global average temperature can lead to major changes in weather, oceans, ice and ecosystems.
The Heat Is On
Carbon dioxide, methane and other greenhouse gases trap heat in the atmosphere. Human activities have increased their concentration, strengthening this natural greenhouse effect.
The Invisible Heat Trap
Power plants, cars, aeroplanes, factories, and buildings burn coal, oil, and gas, releasing large amounts of carbon dioxide. This is one of the biggest drivers of human-caused global warming.
Coal, Oil and Gas: The Biggest Culprits
Trees take carbon dioxide from the atmosphere and store carbon. When forests are cleared or burned, stored carbon can be released while fewer trees remain to absorb CO₂.
When Forests Disappear
Producing steel, cement, chemicals and other goods requires large amounts of energy. Industrial processes and energy use contribute significantly to greenhouse-gas emissions.
Factories Turn Up the Heat
Buildings, roads and other surfaces absorb and store heat. Limited vegetation and high energy use can make cities particularly vulnerable during heatwaves.
Why Cities Feel Like Ovens
Glaciers and ice sheets are losing mass, while Arctic sea ice is declining. Melting land ice contributes to rising sea levels, threatening vulnerable coastal communities.
The Ice Is Melting
Rising temperatures can increase the risk of dangerous heatwaves and influence heavy rainfall, drought and other extreme weather patterns.
When Weather Gets Extreme
Switching to cleaner energy, improving energy efficiency, protecting forests, expanding public transport and adopting cleaner technologies can all help reduce emissions.
Can We Turn Down the Heat?
The faster the world reduces greenhouse-gas emissions, the better the chances of limiting future warming and protecting people, nature and future generations.