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.
Most climate scientists agree the main cause of the current global warming trend is human expansion of the greenhouse effect1 â warming that results when the atmosphere traps heat radiating from Earth toward space. Certain gases in the atmosphere block heat from escaping.
The negative effects of greenhouse effect is very well known among people as global warming. Global warming is a recent phenomena of the 20th and the 21st century. The adverse effects of global warming start from temperature rise to melting of polar ice caps and submerging of the islands and coastal areas under water.he greenhouse effect refers to the way the sun's heat radiates up  from the warmed surface of the earth, where it is absorbed by the  greenhouse gases in the atmosphere. Th â¦ e more gases there are, the  more heat is absorbed.    The natural greenhouse effect is supported by the  water and carbon cycles.