Climate change is a long-term shift in the Earth’s average weather patterns—such as temperature, rainfall, and wind—across local, regional, and global scales, usually over decades or longer. Today, people most often use the term to describe the ongoing, unusually rapid warming of the planet driven mainly by human activities like burning fossil fuels and cutting down forests.

Simple definition (Quick Scoop)

  • Climate change = persistent changes in climate (not day-to-day weather) over a long period, typically decades or more.
  • It includes global warming (rising temperatures) plus related shifts in rainfall, storms, droughts, sea level, and more.
  • Recent climate change is largely caused by increased greenhouse gases from human activities, which trap more heat in the atmosphere.

How experts phrase it

  • NASA: “a long-term change in the average weather patterns that have come to define Earth’s local, regional and global climates.”
  • WMO: changes in the state of the climate, in averages or variability, that persist for decades or longer.
  • Encyclopaedia Britannica: periodic modification of Earth’s climate due to changes in the atmosphere and its interactions with geologic, chemical, biological, and geographic factors.

These all point to the same core idea: climate is long-term average weather, and climate change is when those long-term patterns shift in a lasting way. Information gathered from public forums or data available on the internet and portrayed here.