Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yawcult.co.

J-P. That's Y-A-K-U-L-T dot-C-O-J-P. When it comes to a guide for your gut, count on Yacult.

This is Scientific Americans' 60-second science. I'm Steve Merski. Got a minute?

Less than 4% of countries are responsible for over half of the world's greenhouse gas emissions.

Glenn Arthur of the University of Queensland.

This means that the majority of countries are unfairly bearing the burden of a problem that they did not create.

Clearly, this isn't

fair by any definition. It's much like a non-smoker being trapped in a room and getting cancer

from secondhand smoke, while a heavy smoker continues to puff away in good health.

Author and colleagues at the University of Queensland and the Wildlife Conservation Society

have just published a study analyzing the contributions to climate change by the world's nations

versus the effect that climate change will have on those countries.

We found that developed nations such as Australia, the United States, Canada and Russia are essentially climate free riders,

driving the problem of climate change while incurring relatively few of the costs, such as devastating floods,

increased extreme weather and rising sea levels.

Meanwhile, the most vulnerable countries, many of which are in Africa or are small island states,

produce few greenhouse gas emissions.

The study is in the Nature publication's scientific reports.

While it's important that this issue is defined by scientists, it needs to be acted on by global leaders.

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