State of Planet Podcast

State of the Planet is a podcast produced and developed by the United Nations Environment Programme (UNEP).

UNEP is the leading environmental authority in the United Nations system. Our work focuses on climate change, pollution, biodiversity loss, sustainable development and other issues affecting the planet.

Fertilizers: challenges and solutions

At the start of the 20th century, German chemists Fritz Haber and Carl Bosch developed a method for taking nitrogen from the air and melding it with hydrogen. It would prove to be one of the great scientific advances of the century.

Combined, the two elements made liquid ammonia, a key ingredient in synthetic fertilizers, which would drive an unprecedented agricultural expansion and help feed a fast-growing world.

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