Climate Change
introduction

Burning fossil fuels like oil and coal has provided the energy that shaped our world.

Using fossil fuels has a cost we hadn’t understood . . . until now.

Earth’s climate is changing. Global temperature is rising, weather patterns are shifting and other effects may be on our horizon. While we can’t predict the severity of those impacts in a particular place or time, we can nonetheless see—and measure—many changes.

Yes, climate has changed throughout Earth’s long history, but this time is different. For the first time, complex human societies are facing the consequences of climate change worldwide. Plant and animal species already threatened by fragmented habitats are feeling the impact. And for the first time, humans are causing it.

Can we avoid disastrous climate change by altering the way we live? There is still time. But it will take a worldwide effort, lasting generations. And it needs to start now.


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