Global environmental change, also known as global warming, has been a growing concern for some time. The International Panel on Climate Change states that environmental change is anthropogenic in origin. The World Health Organization defines anthropogenic climate change as a cause of human and human activity. The main causes of environmental change across the world are the increase in carbon dioxide and greenhouse gases.1 In the past, when examining environmental change, the focus was on the environment and the Earth's ozone layer, but climate change has a very immense impact. effect on human health. This article specifically examines how global environmental changes are impacting the health of people residing in Canada. Over the past decade, global environmental changes have caused Canada's temperature to rise by 1.6 degrees Celsius.2 With climate change, a greater spread of infectious diseases was expected in Canada. Extreme weather events can also affect human health due to climate change. The World Health Organization defines an infectious disease as an illness caused by pathogenic microorganisms, such as bacteria, viruses, parasites or fungi; the disease can spread directly or indirectly, from one person to another. In Canada, there is greater concern about waterborne diseases3. Waterborne pathogens are numerous and widespread; some examples include Giardia, cholera, cryptosporidium, rotaviruses, enteroviruses, Coxsackie viruses, cyclospora, and hepatitis A and E viruses.4 Canada has been dealing with waterborne diseases for a some time; an example would be the major outbreak of cholera in Walkerton in 2000. The increase in infectious and waterborne diseases would be extreme and would increase precipitation, flooding and snowstorms. All of these factors are expected to increase in Canada due to climate change, with rising temperatures leading to rising sea and ocean levels.3 Global environmental change also has a huge effect on extreme weather. Severe weather conditions include: extreme heat, thunderstorms, heavy rain, flooding and drought. Extreme weather affects human health in many ways. Extreme, one-way weather affects human health due to extreme heat waves. Populations generally have a temperature threshold that, if exceeded by a significant amount of heat or cold, would generally result in mortality.1 There is a positive correlation between increasing temperature and mortality of individuals in Canada . Extreme heat affects older women, children or the elderly more than cardiovascular disease and hypertension.5 Another factor is rising temperatures that are melting ice and snow in the northern part of Canada, changing the environment by increasing the water level in the sea and ocean.