Primer on climate change and human health : Climate change and human health

Evidence from tree rings, tropical corals and Greenland ice cores indicates that, at least for the Northern Hemisphere, the 20th century was the warmest of the past 1,000 years, with the 1990s being the warmest decade of the millennium. [...] Weather is the condition of various On a global scale, climate is largely regulated by how much energy the elements of the atmosphere at a Earth receives from the sun and how much energy it releases back to particular place and time. [...] Certain chemical compounds in the Earth’s atmosphere act as “greenhouse gases,” absorbing the radiated infrared energy and thereby trapping some of the heat in the atmosphere. [...] The term climate variability is used to the amount of energy stored in the atmosphere. [...] The amount of water vapour stored in the water vapour to the atmosphere.