food security and farming

• food security is having enough food to feed a population
• farming can be affected by new pests and pathogens or changes in the environmental conditions
• sustainable methods of food production are needed to that enough food can be made to feed everyone now and in the future
• overfishing is decreasing fish stocks
• fish stocks can be contained in two main ways: fishing quotas ; net size
• limiting the movement of livestock and keeping them in a temperature-controlled environment reduces the transfer of energy from livestock to the environment