Now days climate changes is challenging for human as well as for agriculture sector. Climate changes effect the food security in four dimensions; food availability, food accessibility, food utilization and food system stability.
There are different changes in climate which affect the crops badly. Global warming is increasing day by day because of gases emitting out of chimneys from cars and burning of fossil fuels. Temperature is increasing day by day. Maturity period of crops is highly effecting by increasing temperature.
The depletion of ozone layer is also the problem. The ultraviolet rays come directly and affect the crops. Effects are already being felt in global markets, and are likely to be particularly significant in specific rural locations where crops fails and yield decline.
Impact will be felt in both rural and urban locations where supply chains are disrupted, market prices increases , assets and livelihood opportunities are lost, purchasing power falls, human health is endangered and effected people are unable to cope.
Rising sea levels and increasing incidence of extreme events pose new risks for the assets of people living in affected zones, threating livelihood and increasing vulnerability to future food insecurity in all parts of the globe .
At the global levels therefore, food system performance today depends more on climate than it did 200 years ago; the possible impacts of climate change on food security have tended to be viewed with most concern in locations where fainfed agriculture is still the primary source of food and income.