# A Simple Guide to Global Climate Change Understanding the causes, impacts, and urgent actions required to address rising global temperatures. - **Source:** [BBC News](https://brifing.si/source/647b890e-c85e-45b8-9588-ccfecdec4a99) - **Published:** 2026-11-06 - **Topic:** [climate](https://brifing.si/c/climate) - **Original article:** - **On Brifing:** https://brifing.si/s/ff0a7dd3-5e69-4585-8c97-aa7f963b0960 ## Defining Global Warming Trends Climate change represents a long-term shift in Earth's average temperatures and weather patterns. Since the 1980s, each decade has been warmer than the previous one. Notably, 2024 became the hottest year on record, marking the first time the planet surpassed 1.5C of warming compared to pre-industrial levels from the late 1800s. ## Human Activity and Emissions While Earth's climate has changed naturally throughout history, current rapid warming is driven by human activities. The widespread use of fossil fuels like coal, oil, and gas releases carbon dioxide. This gas acts like a blanket, trapping energy in the atmosphere, with CO2 levels rising by over 50% since the Industrial Revolution. ## Observed Environmental Consequences Rising temperatures have already triggered frequent extreme weather events, including intense heatwaves and heavy rainfall. Glaciers and ice sheets are melting rapidly, contributing to global sea-level rises. Furthermore, warmer oceans are fueling more powerful storms and causing significant harm to marine life, disrupting ecosystems and economies across the entire globe. ## Economic Impact of Disasters The physical impacts of climate change carry severe economic costs for vulnerable nations. In August 2026, flash floods in Nepal, triggered by a glacier collapse, resulted in over 1,400 deaths. Rebuilding efforts could cost up to one-tenth of the country's entire economy, highlighting the financial burden of climate-related natural disasters. ## The 1.5C Warming Threshold Nearly 200 countries pledged in the 2015 Paris Agreement to limit global warming to 1.5C above pre-industrial levels. Exceeding this limit increases risks to global food security and the spread of climate-sensitive diseases like dengue. Crossing these thresholds risks triggering irreversible tipping points, such as the collapse of the Greenland Ice Sheet. ## Vulnerability and Global Fairness Approximately 3.3 to 3.6 billion people are highly vulnerable to climate change. Poorer nations often suffer the most despite contributing the least to historical greenhouse gas emissions. This disparity raises critical questions about global fairness, as crop failures linked to extreme weather can drive up food prices for everyone worldwide. ## Pathways to Net Zero Reaching net zero CO2 emissions is essential to curbing long-term warming. While renewable energy and electric vehicles show progress, global emissions remain at record highs. The UN warns that without stringent cuts, warming could reach nearly 3C by the end of the century, necessitating urgent and immediate global policy interventions. ## International Climate Negotiations World leaders meet annually to coordinate climate commitments, though progress remains slow. COP29 saw richer nations pledge $300bn annually by 2035 for developing countries, yet this falls short of actual needs. As governments prepare for COP31 in Turkey, the focus remains on transitioning away from fossil fuels to mitigate future risks. ## Sources covering this story - https://www.bbc.co.uk/news/articles/c9w15nggj58o?at_medium=RSS&at_campaign=rss — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._