INTERNATIONAL JOURNAL OF TOURISM, TRAVEL AND HOSPITALITY LAW level of carbon dioxide emissions into the atmosphere has never been reached in the past 800,000 years. Second, the emissions in question had risen and fallen steadily with at least two major periods of ups and downs every 100,000 years. These analyzes show that human activity contributes to global warming. On the other hand, nature also occupies an important status as a key contributing factor to global warming. Chart 1: the general evolution of the emission of CO2 in the air for 800,000 years, source:https://climate.nasa.gov/climate_resources/24/graphic-the-relentless-rise-of-carbondioxide/ 2.2 Climate indicator: temperature anomalies Statistics Canada produces data that helps to better understand the resources and the economy of a country and this through censuses carried out every five years(Canada, 2020)18. This organization provides a definition to the temperature anomaly by indicating that it "relates to the difference in degrees Celsius between the average temperature in a geographical region during a given period". Like climatic variability, which represents a difference between two average climatic states, the climatic anomaly designates the deviation from a reference value in the medium or long term. A positive anomaly indicates that the observed temperature is warmer than the reference value, while a negative anomaly indicates a 18Statistics Canada, [online], 2020, available at < https://www150.statcan.gc.ca/n1/en/type/data> (consulted on 18.11.2019).
RkJQdWJsaXNoZXIy MTE4NzM5Nw==