New study identifies causes of multidecadal climate changes

A new reconstruction of global average surface temperature change over the past 2,000 years has identified the main causes for decade-scale climate changes. The analysis suggests that Earth's current warming rate, caused ...

Global change is triggering an identity switch in grasslands

Since the first Homo sapiens emerged in Africa roughly 300,000 years ago, grasslands have sustained humanity and thousands of other species. But today, those grasslands are shifting beneath our feet. Global change—which ...

Three benefits of Indonesia's permanent ban on forest clearance

Five years ago, Indonesia was considered one of the world's worst forest destroyers. But a permanent moratorium on new clearance of primary forest and peatland, recently announced by Presiden Joko "Jokowi" Widodo's administration, ...

UN climate report: Change land use to avoid a hungry future

Human-caused climate change is dramatically degrading the Earth's land and the way people use the land is making global warming worse, a new United Nations scientific report says. That creates a vicious cycle which is already ...

World warned: change now or endanger food and climate

Humanity faces increasingly painful trade-offs between food security and rising temperatures within decades unless emissions are curbed and unsustainable farming and deforestation halted, a landmark climate assessment said ...

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Climate change

Climate change is any long-term change in the statistics of weather over periods of time that range from decades to millions of years. It can express itself as a change in the mean weather conditions, the probability of extreme conditions, or in any other part of the statistical distribution of weather. Climate change may occur in a specific region, or across the whole Earth.

In recent usage, especially in the context of environmental policy, climate change usually refers to changes in modern climate (see global warming). For information on temperature measurements over various periods, and the data sources available, see temperature record. For attribution of climate change over the past century, see attribution of recent climate change.

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