Food Production: Declining Fish Stock and Sus...

In this episode, we will discuss the alveoli in the circulatory system.Alveoli are microscopic air sacs within the lungs where the crucial exchange of oxygen and carbon dioxide occurs between air and blood through diffusion. Their structure is highly adapted for this vital proces ...  Show more

In this episode, we look at transportation in cells. We will explain how substances move into and out of cells, highlighting three key mechanisms. Diffusion is described as the movement of particles from high to low concentration areas. Osmosis is presented as a specific type of ...  Show more

Fish populations are dwindling around the world due to overfishing. Here's how to make the right choices when dining out or buying fish at the market.A previous version of this episode incorrectly said there are native wild salmon in Chile. Salmon are not native to Chile. See pcm ...  Show more

This episode of The Weekly Tradecast looks at how we can fight climate change by cutting the carbon emissions of our fisheries with David Vivas, an UNCTAD legal officer working on trade and environmental issues. The fishing industry is a vital source of food. And it provides work ...  Show more

The last several decades have taken a toll on the oceans: Some fish populations are collapsing, plastic is an increasing problem and climate change is leading to coral bleaching — as well as a host of other problems. But marine biologist and World Economic Forum programme lead Al ...  Show more

The last several decades have taken a toll on the oceans: Some fish populations are collapsing, plastic is an increasing problem and climate change is leading to coral bleaching — as well as a host of other problems. But marine biologist and World Economic Forum programme lead Al ...  Show more