Return of the Bible Plagues

Researchers in Europe and America investigate the spread of toxic algae.

Mosquito-borne malaria kills two million people every year, especially in Africa.

Researchers try to decode the conditions of origin for hail and heavy rain.

The second book of Moses reports that so many pests covered Egypt that the surface of the land could no longer be seen. They covered all greenery and ate the trees bare. Swarms of locusts are still a nuisance today.

In China, 20 percent of the country is already covered by deserts. The sand eats an area the size of Luxembourg every year. China has set itself the goal of building a 4,500 km long `green wall' as a bulwark against sandstorms.