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What is climate change? A really simple guide - BBC News
What is climate change? The Earth's average temperature is about 15C but has been much higher and lower in the past. There are natural fluctuations in the climate but scientists say temperatures ...

What is climate change? A really simple guide - BBC News
What is climate change? The Earth's average temperature is about 15C but has been much higher and lower in the past. There are natural fluctuations in the climate but scientists say temperatures ...

Understand | GlobalChange.gov
The Fourth National Climate Assessment (NCA4), developed by the U.S. Global Change Research Program (USGCRP), is a state-of-the-science synthesis of climate knowledge, impacts, and trends across U.S. regions and sectors to inform

What is Climate Change? | Start Here - YouTube
The hard facts about global warming - a defining issue of our time.Climate change is happening now, and even world leaders meeting for climate talks at this ...

What Is Climate Change? | NASA
What Is Climate Change? Climate change is a change in the usual weather found in a place. This could be a change in how much rain a place usually gets in a year. Or it could be a change in a place's usual temperature for a month or season. Climate change is also a change in Earth's climate. This could be a change in Earth's usual temperature.

What is climate change: facts for kids | National ...
So, what is climate change? Climate change (or global warming), is the process of our planet heating up. Scientists estimate that since the Industrial Revolution, human activity has caused the Earth to warm by approximately 1°C. While that might not sound like much, it means big things for people and wildlife around the globe.

What is climate change? - David Suzuki Foundation
What is climate change? “Climate change” describes a change in the average conditions — such as temperature and rainfall — in a region over a long period of time. Earth’s climate is always changing over long periods of time and has been hotter and cooler than it is now, but the pace of change has sped up significantly in recent decades.

What Is Climate Change? | NASA Climate Kids
What Is Climate Change? Alaska's Muir glacier in August 1941 and August 2004. Significant changes occurred in the 63 years between these two photos. Credit: USGS. Climate change describes a change in the average conditions — such as temperature and rainfall — in a region over a long period of time. For example, 20,000 years ago, much of the ...