India, Nov. 6 -- A new paper track a broad set of indicators to convey the effects of human activities on greenhouse gas emissions, and the consequent impacts on climate, environment and society

Exactly 40 years ago, a small group of scientists met at the world's first climate conference in Geneva. They raised the alarm about unnerving climate trends.

Today, more than 11,000 scientists have co-signed a letter in the journal BioScience, calling for urgently necessary action on climate.

This is the largest number of scientists to explicitly support a publication calling for climate action. They come from many different fields, reflecting the harm our changing climate is doing to every part of the natural world.

Read more: 40 years ago, ...