In 2025, the world’s attention turns to Brazil as it hosts the United Nations Climate Change Conference, commonly known as COP30. This event marks a crucial moment for discussions among political leaders, scientists, and policymakers as they address the pressing issue of Earth’s evolving climate.
The state of the Earth’s climate—essentially an average of global weather patterns—demands our attention. The changes we observe today are largely human-induced, with significant advancements in understanding the impact of specific greenhouse gas emitters.
Understanding the Drivers of Climate Change
Since the dawn of the industrial revolution in the 18th century, human activity has significantly altered the planet’s climate. This conclusion is supported by various data sources, including weather stations that provide long-term records of temperature and rainfall, and satellite technology that monitors changes in polar ice.
To comprehend climate changes over longer timescales, scientists also examine environmental indicators like tree rings, ice core air bubbles, and coral formations. These indicators collectively highlight the significant shifts in Earth’s systems, accelerated by the combustion of fossil fuels—coal, oil, and gas—over recent decades.
The science behind this is well-established: carbon dioxide, a greenhouse gas, traps heat in the atmosphere, warming the planet. This understanding has roots in the 19th century, with key contributions from scientists such as Eunice Foote and Svante Arrhenius. The link between greenhouse gases and global warming was further substantiated in 1938 by Guy Callendar.
Human Impact on Climate Unraveled
Modern advancements in climate science have strengthened the evidence of human influence on global warming. Enhanced observational data and sophisticated climate models have made it possible to trace climate changes directly to human activities, even at regional and local levels.
The technique known as event attribution allows scientists to connect extreme weather events to human-induced climate change. By simulating these events with and without human impact, researchers can pinpoint the human fingerprint on climate phenomena.
Recent studies have gone further, linking specific company or project-level greenhouse gas emissions to climate impacts. For instance, the Scarborough gas project in Western Australia is projected to cause significant environmental damage, illustrating the tangible consequences of such emissions.
The Future of Our Climate
Despite the overwhelming evidence of climate change driven by human actions, global greenhouse gas emissions remain at unprecedented levels. However, the trajectory has shifted since the 2015 Paris Agreement, with emissions growth slowing and potentially peaking by the 2030s.
Nonetheless, current policies predict a peak global warming of 2.8°C, according to the UN Emissions Gap report. Stricter adherence to emission reduction commitments could limit warming to 2°C, emphasizing the importance of immediate action.
As COP30 unfolds, millions are hopeful that the conference’s outcomes will inspire greater ambition and concrete steps to mitigate global warming and its far-reaching effects.
Original Story at theconversation.com