What is the result of greenhouse effect?

-global warming -sea level rise -economic impact -agricultural impact -effects on aquatic systems -effects on hydrological cycles
there are adverse effects == The most direct effect of climate change on humans might be the impacts of hotter temperatures themselves. Extreme high temperatures increase the number of people who die on a given day for many reasons: people with heart problems are vulnerable because one's cardiovascular system must work harder to keep the body cool during hot weather, heat exhaustion, and some respiratory problems increase. Global warming could mean more cardiovascular diseases, doctors warn.[175] Higher air temperature also increase the concentration of ozone at ground level. In the lower atmosphere, ozone is a harmful pollutant. It damages lung tissues and causes problems for people with asthma and other lung diseases.[176] Rising temperatures have two opposing direct effects on mortality: higher temperatures in winter reduce deaths from cold; higher temperatures in summer increase heat-related deaths. The net local impact of these two direct effects depends on the current climate in a particular area. Palutikof et al.(1996) calculate that in England and Wales for a 1 °C temperature rise the reduced deaths from cold outweigh the increased deaths from heat, resulting in a reduction in annual average mortality of 7000,[177] while Keatinge et al. (2000) "suggest that any increases in mortality due to increased temperatures would be outweighed by much larger short term declines in cold related mortalities."[178] Cold-related deaths are far more numerous than heat-related deaths in the United States, Europe, and almost all countries outside the tropics.[179] During 1979-1999, a total of 3,829 deaths in the United States were associated with excessive heat due to weather conditions,[180] while in that same period a total of 13,970 deaths were attributed to hypothermia.[181] In Europe, mean annual heat related mortalities are 304 in North Finland, 445 in Athens, and 40 in London, while cold related mortalities are 2457, 2533, and 3129 respectively.[178] According to Keatinge et al. (2000), "populations in Europe have adjusted successfully to mean summer temperatures ranging from 13.5°C to 24.1°C, and can be expected to adjust to global warming predicted for the next half century with little sustained increase in heat related mortality."[178] A government report shows decreased mortality due to recent warming and predicts increased mortality due to future warming in the United Kingdom.[182] The European heat wave of 2003 killed 22,000-35,000 people, based on normal mortality rates.[183] Peter A. Stott from the Hadley Centre for Climate Prediction and Research estimated with 90% confidence that past human influence on climate was responsible for at least half the risk of the 2003 European summer heat-wave.[184] == See also: Tropical disease Global warming may extend the favourable zones for vectors[185] conveying infectious disease such as dengue fever,[186] West Nile Virus,[187] and malaria.[188][189] In poorer countries, this may simply lead to higher incidence of such diseases. In richer countries, where such diseases have been eliminated or kept in check by vaccination, draining swamps and using pesticides, the consequences may be felt more in economic than health terms. The World Health Organisation (WHO) says global warming could lead to a major increase in insect-borne diseases in Britain and Europe, as northern Europe becomes warmer, ticks-which carry encephalitis and lyme disease-and sandflies-which carry visceral leishmaniasis-are likely to move in.[190] However, malaria has always been a common threat in European past, with the last epidemic occurring in the Netherlands during the 1950s. In the United States, Malaria has been endemic in as much as 36 states (including Washington, North Dakota, Michigan and New York) until the 1940s.[191] By 1949, the country was declared free of malaria as a significant public health problem, after more than 4,650,000 house DDT spray applications had been made.[192] The World Health Organisation estimates 150,000 deaths annually "as a result of climate change", of which half in the Asia-Pacific region.[193] In April 2008, it reported that, as a result of increased temperatures, the number of malaria infections is expected to increase in the highland areas of Papua New Guinea.[194]
Earth could become like the planet Venus.