It has become undeniable that Earth’s climate is warming. This time, humans are mostly responsible, and the overwhelming majority of climate scientists agree.

Climate change is already causing significant impacts to people and ecosystems, and these impacts will grow much more severe in the coming years.

What Is Climate Change & Global Warming?

Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years. It may be a change in average weather conditions, or in the distribution of weather around the average conditions.

While there are natural and atmospheric factors that can cause climate change, most of the current changes we are experiences are due to human-induced alterations of the natural world.

Global warming is a climate change caused by these human-specific impacts. Scientists are more than 90% certain that global warming is caused by increasing concentration of greenhouse gases produced by human activities, such as burning of fossil fuels and deforestation.

Visit the National Geographic Global Warming resource page for the latest news and findings.