Global warming refers to the long-term rise in Earth’s average surface temperature, and it is primarily driven by the increase in greenhouse gas emissions produced by human activities. Greenhouse gases, such as carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O), naturally exist in the atmosphere and play an essential role in maintaining the planet’s temperature. They trap heat from the sun, preventing it from escaping back into space, which keeps Earth warm enough to sustain life. However, over the past century, human actions have significantly increased the concentration of these gases, intensifying this natural process and leading to global warming.

One of the main sources of greenhouse gas emissions is the burning of fossil fuels like coal, oil, and natural gas. These fuels are widely used for electricity generation, transportation, and industrial processes. When they are burned, they release large amounts of carbon dioxide into the atmosphere. Deforestation is another major contributor, as trees that would normally absorb CO₂ are cut down, reducing the Earth’s capacity to regulate atmospheric carbon levels. Agriculture also plays a role, particularly through livestock farming, which produces methane, a greenhouse gas that is far more potent than carbon dioxide in trapping heat.

The consequences of global warming are already visible across the globe. Rising temperatures have led to the melting of polar ice caps and glaciers, causing sea levels to rise. This poses a significant threat to coastal communities and low-lying countries, increasing the risk of flooding and land loss. Additionally, global warming is linked to more frequent and severe weather events, such as heatwaves, droughts, hurricanes, and heavy rainfall. These extreme conditions can damage infrastructure, reduce agricultural productivity, and threaten food security.