Why is "History of the Petroleum industry in Alberta" trending?

Wikipedia Overview

The petroleum industry has had massive social, economical, political, cultural, and demographic influences on the Canadian province of Alberta during the 20th and 21st centuries, especially during the second half of the 20th century. Oil and gas replaced agriculture and ranching as the primary industry, resulting in the province becoming one of the richest in the country. Nationally, the discovery allowed Canada to become self-sufficient within a decade and ultimately a major exporter of oil. Most of its oil production came from its enormous oil sands deposits, whose production has been steadily rising in recent years. It has produced only 5% of its oil sands, and its remaining oil sands reserves represent 98% of Canada's established oil reserves. The issue of the control of oil has been the main conflict between the provincial government and the federal government, with the issue of oil defining the provincial-federal relationship at every level. The petroleum industry in Alberta has been one of the main factors that have contributed to Western alienation, and Alberta separatism, especially during the 1980s when the federal government under the control of Pierre Trudeau crippled the prospering Albertan economy through the National Energy Program.