In a world where the economy has become so dependent on supply chains and transport networks, the question of how to make sure we’re getting the right stuff is now a growing concern.
But what’s in such pipelines?
And while many have been built with the help of government grants, others are funded by companies that are keen to avoid the regulations and restrictions that come with them.
Here are some of the most notable examples:A pipeline that transports oil from the oil sands to refineries in Alberta has been operating for more than a decade, supplying almost 60 per cent of the country’s crude.
The Canadian Association of Petroleum Producers (CAPP) says it is the most modern pipeline ever built, running from Hardisty, Alta., to Port Arthur, Tex., in the US.
It has been used for more oil than any other in the world, but in 2010 the US Department of Energy (DOE) cut its environmental impact statement, and the US Pipeline and Hazardous Materials Safety Administration (PHMSA) said it was unlikely to approve it.
Its construction was funded by the Canadian government through the Canada Pension Plan Investment Board (CPPIB), which is a state-owned entity.
Its owner, TransCanada, was fined $1.6 billion in 2014 by a US court for its role in the leak in the Gulf of Mexico.
In February, the company agreed to pay $4.6bn to settle the case.
It was also the subject of a $2.8bn civil suit in 2016 by the state of Minnesota against the state’s pipeline company, Dakota Access.
The company’s owner, Energy Transfer Partners, was also fined $3.5bn by the Minnesota court for the same spill.
In the US, more than 2,000 pipeline projects have been proposed or in the planning stages since the mid-1990s.
Some have been shut down because of safety concerns, such as a planned pipeline from Canada to a shipping hub in New Jersey.
Others, such an undersea pipeline from Alberta to New Mexico.
There have been more than 400 spills in Canada since 2001.
The US is one of only two countries in the World, along with Britain, to ban drilling in protected areas.
But in 2018, President Donald Trump signed a bill into law that allowed drilling in US waters and opened the door for other countries to do the same.
In 2017, an explosion on the North Dakota oil pipeline in the state sent oil spewing into the air and killing 10 people.