Answers to Three Questions About Climate Change, Food Supply and Agriculture

Before reading these articles, I explained the impact of climate change on food supply, especially in the past few years due to droughts and heat waves all over the country. I do not know how this shortfall will affect the world economy, but I do not think it will be a plus. I also want to know what I can do to solve the problem of food shortage, so millions of people around the world will not be affected by health or economics.

Climate Change The US Environmental Protection Agency (EPA) says, "For agriculture and food supply The impact of the climate on the report "in the report entitled" From the US climate change science program etc. Ironically, the US Environmental Protection Agency says that although the increase in carbon dioxide may be beneficial for "specific crops in a particular location", the necessary nutrient levels, soil moisture and water supply requirements were met I pointed out that only in case. "Changes in the frequency and severity of droughts and floods can cause difficulties for farmers and ranchers. Overall, due to climate change, cultivation of crops, breeding of animals, capture of fish in the same way as in the past It will be possible, the fish has become more difficult. "

To assess the impact of climate change on agricultural production, food supply, agriculture-based livelihood, consider the characteristics of agricultural ecosystems that alter the biochemical processes caused by specific climates, It is necessary to judge. Their effect will be plus, minus, or neutral. The so-called "greenhouse fertilization effect" will produce a regionally beneficial effect that higher levels of atmospheric CO2 stimulate plant growth. This mainly occurs in temperate areas, crop yields with low photosynthetic efficiency (C3 crops) are expected to increase by 10% to 25%, crops with high photosynthetic efficiency (C4 crops) are expected to increase from 0% to 10% . The amount of carbon dioxide in the atmosphere reaches 550 ppm (IPCC, 2007 c), but these effects are unlikely to affect the global food supply forecast (Tubiello et al., 2007).

Potential impact of climate change on the stability of food systems: Supply stability: Many crops have a one-year cycle, and production varies with climate change, especially rainfall and temperature. Therefore, it is difficult to maintain the continuity of food supply while generating seasonality. Droughts and floods are a special threat to food stability and can lead to long-term and short-term food insecurity. Both are expected to become more frequent, more intense and unpredictable due to climate change. In rural areas that rely on rainfed agriculture as an important part of local food supply, increased rainfall and time changes and changes in weather changes during the season may exacerbate the instability of regional food systems not.