This week in the Planet Earth Podcast: a look at potential solutions to urban flooding, and why scientists are so keen to measure carbon dioxide flow through the UK's Norfolk Fens.

This week in the Planet Earth Podcast: how conservationists are using science to help protect rare plants found only in Bristol's Avon Gorge, and are feminised fish changing wild fish populations?

This week in the Planet Earth Podcast: why salt marshes are so important, but are difficult to recreate; how storms are made; and why the ground beneath our feet could provide decades of natural heating.

This week in the Planet Earth Podcast: the steps scientists are taking to make sure the trees we plant today can cope with tomorrow's warmer climate; tracking gannets to find out how environmental change might affect them; and a tropical Antarctica.

This week in the Planet Earth Podcast: why accurately forecasting solar storms is becoming increasingly important; and how understanding how fish shoal could interest economists.

This week in the Planet Earth Podcast: what the first creatures to walk on land looked like; the connection between the biodiversity of upland rivers and the ecosystem services they provide; and in an audio diary from Turkey, a University of Leeds researcher on the North Anatolian Fault.

This week in the Planet Earth Podcast: sex and the survival of honey bee colonies; why rivers are still recovering from the legacy of acid rain; and collecting coral from the Atlantic seabed.

This week in the Planet Earth Podcast: how dairy farming in Africa 7000 years ago led to the speedy evolution of the gene that lets us digest milk; and how climate change could be having a detrimental effect on seabirds and fish in the Southern Ocean.

This week in the Planet Earth Podcast: how browner drinking water presents problems for the water companies; the effect of street lighting on bats and their commuter routes; and how ultraviolet light makes plants emit methane.

This week in the Planet Earth Podcast: a look at how urban heat islands will alter under climate change, and how these changes might affect your health, as well as our railways, roads and energy supplies. Also: why Europe's oldest cave art might not have been painted by humans at all.