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Behind The News: 20/04/2010
20/04/2010
ABC  |  April 20, 2010

Population Debate
Populate or Perish has long been a catchcry for Australia.... . but the latest projections show Australia will have a population of 35 million by 2050. It's due to the Generation x baby boom - as well as immigration. Will that be too many people? BTN examines both sides of the immigration debate. Those in favour of a bigger Australia say it's an economic imperative. Others argue that our resources are already stretched - and the rate of growth should be slowed. We look at how and why the immigration boom started after WW2 - and how new arrivals have made their mark in modern Australia.

Reef Ship
The Chinese coal carrier Shen Neng One has just been refloated after running aground on the Great Barrier Reef. It was stuck there for 10 days, leaking oil. and damaging the coral as it dragged over the reef for one kilmometre. So how could this happen, and how hard will it be to fix the mess? How can we protect the environment while still allowing ships to deliver and pick up cargo? We look at the principal of how shipping lanes are supposed to keep boats moving in a safe and orderly fashion, like cars on roads.

Iceland Volcano
The Volcanic eruption in Iceland is now causing chaos across Europe. The spread of ash poses serious problems for aircraft so flights have been grounded - stranding thousands of passengers. BTN reports on this issue and how an eruption under ice can cause other threats...such as major flooding from the melting ice.

High Clouds
We look at an unusual way scientists are investigating climate change. They're studying the temperatures of noctilucent clouds... which are found 100 kilometres above the earth and are the world's highest clouds. From a small Antarctic hut, scientists point a powerful laser beam called a Lidar into the night sky...to measure the heat in clouds that are too high for balloons and too low for satellites.

Gudgeon Project
The River Murray's Southern Purple Spotted Gudgeon was thought to be extinct - until a small colony was re-discovered in South Australia. BTN looks at an ambitious project to breed-up their numbers, and how a group of kids has been able to help. We were there when these small fry were released back into the river - to hopefully start a Gudgeon comeback.

Population Debate
Populate or Perish has long been a catchcry for Australia.... . but the latest projections show Australia will have a population of 35 million by 2050. It's due to the Generation x baby boom - as well as immigration. Will that be too many people? BTN examines both sides of the immigration debate. Those in favour of a bigger Australia say it's an economic imperative. Others argue that our resources are already stretched - and the rate of growth should be slowed. We look at how and why the immigration boom started after WW2 - and how new arrivals have made their mark in modern Australia.

Reef Ship
The Chinese coal carrier Shen Neng One has just been refloated after running aground on the Great Barrier Reef. It was stuck there for 10 days, leaking oil. and damaging the coral as it dragged over the reef for one kilmometre. So how could this happen, and how hard will it be to fix the mess? How can we protect the environment while still allowing ships to deliver and pick up cargo? We look at the principal of how shipping lanes are supposed to keep boats moving in a safe and orderly fashion, like cars on roads.

Iceland Volcano
The Volcanic eruption in Iceland is now causing chaos across Europe. The spread of ash poses serious problems for aircraft so flights have been grounded - stranding thousands of passengers. BTN reports on this issue and how an eruption under ice can cause other threats...such as major flooding from the melting ice.

High Clouds
We look at an unusual way scientists are investigating climate change. They're studying the temperatures of noctilucent clouds... which are found 100 kilometres above the earth and are the world's highest clouds. From a small Antarctic hut, scientists point a powerful laser beam called a Lidar into the night sky...to measure the heat in clouds that are too high for balloons and too low for satellites.

Gudgeon Project
The River Murray's Southern Purple Spotted Gudgeon was thought to be extinct - until a small colony was re-discovered in South Australia. BTN looks at an ambitious project to breed-up their numbers, and how a group of kids has been able to help. We were there when these small fry were released back into the river - to hopefully start a Gudgeon comeback.

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