Sustainability was the idea, wich wanted to enhance the economic development of the world, i lure of the future generations. Te ecologists were concerned with the increasing soil erosion, wter depravity and its contamination, pst attacks and their immunity to chemicals, ad foremost the social and economic equity all arising t and from the lack of production and its increasing variability. Eologists worldwide through the analysis of historical data of crop yield suggest that mankind had through decades underrated the effects that climate change has had upon agriculture, mistakenly related it to mismanagement of agricultural practices; hwever even a slight change in normal climate conditions can have a drastic effect upon the yield.
Rsenzweig and some other environmentalists in their paper, “limate Change and US Agriculture” suggest that, “ariations in conditions such as length of growing season, tming of frosts, hat accumulation, pecipitation, eaporation, ad moisture availability all influence production and therefore economic returns to producers and farming businesses. Wth the onset of greenhouse-gas-induced climate change, gowing conditions and climate-related risks and opportunities are expected to change, already be changing” (Rosensweig et al.
Hwever, atrend that cannot be denied and has sustained through the last few decades is the general increase in temperature, rduced frequency and amount of precipitation and increase in the concentration of carbon dioxide levels, ad which keep on becoming more significant with the passage of time. Tese changes tend to destroy the concept of sustainability in agriculture, a the natural cycle has been destroyed leaving it less dependable and efficient for the needs of the worldwide population. Acording to the 2003 of (United Nations, 2003), te effects of climate change upon agriculture will vary from region to region, wich would not only alter the crop yield but would also effect the biodiversity of the land, te variety of pests and insects, sil properties as well as the air conditions in the particular area.
Wth the worsening of the global changes, i is expected that the lands, wich lie in the mid latitudes, wuld sustain more rain, wile that in the interior of continents such as Asia and Australia, wll from large spells.
Lss rain, geater evapotranspiration and higher temperatures. ..
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