From the Arctic to the South Pacific, a new pipeline threatens the water supply of millions of people.
The pipeline, which is being built by the Canadian company TransCanada, would stretch from Alaska’s northernmost point to the Pacific.
But now the Federal Government has warned it will use “extraordinary” measures to prevent the pipeline from going ahead.
What are the risks of the pipeline?
The proposed pipeline would run from the Gulf of St Lawrence to the Arctic Ocean and eventually to the Gulf Coast of South America.
It would be built under a large scale oil platform that would have to be closed to prevent it from spilling.
It is also proposed to cross the Bering Strait, which separates the Arctic and the Canadian Arctic, in a bid to cross a huge amount of water.
But the pipeline would have an enormous spillway which would also cut the sea water supply in the Arctic.
It could also affect salmon, steelhead, whales and seals.
What has the Federal government done to stop the pipeline’s construction?
The Government is facing an unprecedented threat from the proposed pipeline, and has warned that the Government will take extraordinary measures to ensure the pipeline can’t be built.
“It’s a really big deal.
We have to get that pipeline built.
That’s the way it has to be,” Federal Minister of Infrastructure and Transport Peter van Vugt told ABC Radio.
“If you are going to build it, you need to have it built within your safety net.”
He said the Government would be using “extra-ordinary” means to prevent construction of the project.
“We’ve got a lot of people who are concerned about the pipeline and we’ve got to be vigilant,” Mr van Vuul told ABC’s Insiders.
“It’s an incredible pipeline.
It’s not a project that we can afford to delay.”
What do we know about the proposed project?
The proposal is for a pipeline which would be the longest existing oil pipeline on the planet.
It was built in the 1980s, and was approved by the Australian Government in 2002.
It will be about 40km long, and would run to the southern tip of Bering Sea.
The line would be able to carry as much as 8.8 million barrels of oil per day.
The project is being run by TransCanada and has been awarded the first of three permits for the project, which are expected to be completed in 2021.
TransCanada says the project would carry 1.5 million barrels per day of oil to Alaska, Canada and Norway.
What are the environmental benefits of the proposed oil pipeline?
TransCanada estimates the pipeline will deliver up to $3.7 billion in additional revenue for the Government.
Transcanada’s director of public affairs, Rob Wilson, said the project was not opposed by the environmental community.
But he said TransCanada had to go through stringent environmental reviews and a number of other measures to meet environmental requirements.
He told ABC News the Government had taken measures to mitigate the risk of spillway damage and would now be using the “extra extraordinary measures” outlined in the Federal Cabinet’s Energy Security Plan.
TransCanada says it has already built a number onshore pipeline infrastructure and has already completed the Trans-Alaska Pipeline.
The company said it was committed to completing a second Trans-Arctic Pipeline from its existing northern terminal to Alaska’s Gulf Coast.
TransCanada has also proposed a Trans-Canadian Pipeline, but it is currently in the pipeline planning stage.
Who is TransCanada?
TransCanADA is a company owned by TransTech Group, which was founded in 2010 and is the sole operator of TransCanada’s oil pipeline project.
It is one of the largest pipeline companies in the world.
Its subsidiary TransEnergy has more than 30 pipelines under construction in the US and Canada, and it has more oil tankers on the way to the US.
Key points: The Government is concerned the proposed TransCanada pipeline could cause a spill that could threaten salmon, marine mammals, steelheads, and other species on the sea surface.
The project has been approved by an Environmental Impact Statement (EIS) process and is expected to commence construction by 2021.
Environmentalists have called for an immediate halt to construction.
Canberra has long warned of the risks to its water supply from the project and the risk that a pipeline could damage sensitive ecosystems.
How is the project different to the others?
The project will be built on the Bismarck Sea shelf, and is about 2,000km from the coast of South Australia.
At its heart, the project is an oil pipeline, but there are also two major features.
First, it will run under a massive platform that will be close to the sea floor.
Second, it is proposed to be constructed under a vast oil platform which would have the capacity to hold 8.5m barrels of crude.
If completed, the TransCanada project would cross