Even if climate change were to have minimal impacts on the supply of food or on the ability of households to access it, it could still affect food security through its effects on the utilization of food. The utilization component of food security is perhaps its murkiest and least well-studied aspect, but generally relates to the nutritional aspects of food consumption. Supposing availability and access issues are taken care of, achieving proper food utilization requires satisfactory answers to three questions: does the food an individual eats contain all the energy, protein, and nutrients necessary for her to lead a healthy and productive life? Is the food itself safe and not likely to make her ill? And finally, is the individual healthy enough to take advantage of the food's nutritional qualities?
New evidence is indeed emerging about the potential effects of climate change on food utilization. Nevertheless, and as in the case of food access, climate will be only one component of a broader suite of issues that shapes an individual's ability to utilize food properly.
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Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.