In medicine (gastroenterology), angiodysplasia is a small vascular malformation of the gut. It is a common cause of otherwise unexplained gastrointestinal bleeding and anemia. Lesions are often multiple, and frequently involve the cecum or ascending colon, although they can occur at other places.Treatment may be with colonoscopic interventions, angiography and embolization, medication, or occasionally surgery.igns and symptoms [edit]. Although some cases present with black, tarry stool (melena), the blood loss can be subtle, with the anemia symptoms predominating. Fecal occult blood testing is positive when bleeding is active.
Consequences of greenhouse-effect temperature rises. Predicting the consequences of global warming is one of the most difficult tasks for the worldâs climate researchers. This is because the natural processes that cause rain, hail and snow storms, increases in sea level and other expected effects of global warming are dependent on many different factors.
The Greenhouse Effect. The heat reflected back by greenhouse gases produces a measurable warming of the Earthâs surface and oceans. This global climate change has wide ranging effects on the Earthâs ice, oceans, ecosystems, and biodiversity. Carbon Dioxide. Carbon dioxide is the most important greenhouse gas. It is produced from the use of fossil fuels to generate electricity (for example, coal-fired power plants) and to power vehicles. The cement manufacturing process produces a lot of carbon dioxide.