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​There have been several fatal bridge disasters over the course of Canada’s history, some during construction, others after the bridge was in use for some time.

The digital economy is the economic activity conducted through digital technologies such as the Internet. It is also called the Internet economy, the new economy or the web economy. Many scholars see the digital economy as the fourth industrial revolution. As of 2013, it consumed approximately 10 per cent of the world’s electricity. Many of the world’s biggest companies operate in the digital economy. A growing number of Canadians depend on it for their livelihood. In 2017, nearly 5 per cent of all jobs in Canada were in the digital economy. The gross domestic product (GDP) connected to it represented 5.5 per cent of Canada’s total economy — a bigger percentage than mining or oil and gas extraction. However, the often-hidden infrastructure of the digital economy brings new threats to the environment. The rise of cryptocurrencies could also dramatically change how people buy and sell things.

People did not start drilling for buried petroleum until the middle of the 19th century, though its existence had been known for centuries.

SNC-Lavalin is a global engineering and construction firm based in Montreal, Quebec. It works in several industries including oil and gas, mining, cybersecurity and nuclear power. It also builds public and private infrastructure around the world.

The company began in 1911 as an engineering consultant for power projects. In 1991, the original company, called SNC, merged with competitor Lavalin to become SNC-Lavalin. Today it employs some 50,000 people in more than 50 countries. In 2018, it registered $10.1 billion in revenue.

In Canada, the company has received contracts to build major transit projects in cities including Toronto, Montreal and Vancouver. Worldwide, SNC-Lavalin oversees resource-extraction and infrastructure projects in North America, the Asia-Pacific region, Europe and the Middle East.

Since 2011, allegations of fraud and corruption on the part of SNC-Lavalin and several of its executives have plagued the company with scandal.

Natural gas ranks among the fastest-growing energy sources in Canada and is seen by many in the energy industry as a game-changer, a comparatively clean, low-cost and versatile fuel. It can directly generate power and heat and can be chemically altered to produce a wide range of useful commodity chemicals. It burns cleaner and more efficiently than other fossil fuels, releasing significantly fewer harmful pollutants into the atmosphere. Natural gas is colorless, odourless, shapeless, lighter than air and contains a mixture of several hydrocarbon gases, which are organic compounds consisting of some combination of hydrogen and carbon molecules.

The primary consumers of natural gas are the industrial (54.1 per cent), residential (26.6 per cent) and commercial sectors (19.3 per cent). Canada is the fifth largest natural gas producer after the United States, Russia, Iran and Qatar. Currently, all of Canada’s natural gas exports go to the United States through a network of pipelines, making Canada the largest foreign source of US natural gas imports. At the end of 2016, Canada had 76.7 trillion cubic feet of proven natural gas reserves and had produced 152 billion cubic metres of natural gas that year. It is forecasted that global natural gas consumption will double by 2035.

Canada’s second deadliest road disaster was a single-vehicle bus crash that killed 40 people near Eastman, Quebec on 4 August 1978.

In the early morning of 6 July 2013, a runaway train hauling 72 tankers filled with crude oil derailed as it approached the centre of the town of Lac-Mégantic, Quebec. The tanker cars exploded and the oil caught fire, killing 47 people and destroying many buildings and other infrastructure in the town centre. The fourth deadliest railway disaster in Canadian history, the derailment led to changes in rail transport safety rules as well as legal action against the company and employees involved in the incident. Years after the derailment, re-building was still ongoing and many of the town’s residents continued to suffer from post-traumatic stress.

Dorothea Ferguson (née Palmer), birth control advocate, social worker (born 1908 in England; died 5 November 1992 in Ottawa, ON). Dorothea Palmer was arrested in 1936 for advertising birth control to women in a working-class neighbourhood in Ottawa. She was cleared of charges after a lengthy trial proved her work had been for the public good. Her acquittal was a major victory for the birth control movement in Canada.

A collision between a school bus and a freight train on 7 October 1966 killed 19 students from Cité-des-Jeunes secondary school near Vaudreuil, Quebec, and their bus driver. The crash is among the worst road disasters in Canadian history.

Opened on 7 February 1990, the Montréal Insectarium is part of the “Space for Life” network, which includes Montréal’s Biodome, Planetarium and Botanical Garden.

The Dawson site is an ancient Iroquoian village located on the Island of Montréal, next to Mount Royal. The site, which was initially located on a sand dune, covers about two acres.

The SkyTrain is the rapid transit rail system serving Metro Vancouver, British Columbia. It uses mostly Advanced Light Rapid Transit (ALRT) technology, an automated rail system that operates mainly on a raised guideway, although some sections run underground or at street level. Regular service began 3 January 1986. The SkyTrain’s opening coincided with Expo 86, the world’s fair hosted by Vancouver as part of its 100th anniversary celebrations. The system is run by TransLink, the provincial transit agency for the South Coast of British Columbia. It was the world’s first driverless urban rail system. Now, it is one of the longest fully automated rapid transit systems in the world. The SkyTrain has three lines connecting 53 stations in seven municipalities. In 2018, it had more than 495,000 boardings per weekday, on average.

Aluminum is a lightweight, strong and flexible metal that resists corrosion and is 100 per cent recyclable. It is a common material in vehicles, buildings, consumer goods, packaging, power transmission and electronics. Canada’s aluminum industry began at the turn of the 20th century and grew quickly during both World Wars. Today, Canada is the world’s fourth largest producer and second largest exporter of aluminum. The country nevertheless accounts for less than 5 per cent of global production. Aside from one smelter in Kitimat, British Columbia, all Canadian plants are in the province of Quebec.

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