Blood group: An inherited feature on the surface of the red blood cells. A series of related blood types constitutes a blood group system, such as the Rh or ABO system. The frequencies of the ABO and Rh blood types vary from population to population.lood group: An inherited feature on the surface of the red blood cells. A series of related blood types constitutes a blood group system, such as the Rh or ABO system. The frequencies of the ABO and Rh blood types vary from population to population.
October 22, 2009. Running time 1:26. Climate scientists explain why theyâre sure the primary cause of global climate change today is increasing human emission of greenhouse gases â mainly carbon dioxide. Skip to main content
Note: for proof on the common knowledge that humans cause global warming, check out that link or this one on human vs natural causes of global warming.he main cause of global warming is the generation of electricity. To generate electricity we have to burn fossil fuels which emits very hazardous chemicals. This causes the generation of green house gases which is very dangerous to our environment.