Tianjin:The Chemical and Economic Fallout

After last week's explosions at a chemical warehouse in Tianjin, we find out what toxins were unleashed and what are the costs to the global economy.

Two thousand people fleeing war and poverty in their home countries have died this year trying to reach Europe and in the last days, another 40 migrants were found dead on an overcrowded boat off Italy. Despite the dangers, they keep coming. We find out why.

And can you really eliminate water-bourne bacteria with pages from The Drinkable Book?

(Picture: A damaged building is seen among debris at the site of last week's explosions in Tianjin, China. Credit: Reuters)