Food security measures whether people are guaranteed with enough food to supply their required nutrition. This is important because it has to do with the status of a nation, how a nation's people live, and what that nation does with food to have such conditions.
Global warming is one of Earth's biggest problems... We create something that is called a "carbon footprint" which literally is how much of the problem is caused by us. What's happening every minute of the day, Earth gets a little bit warmer, as that happens, our icebergs and glaciers begin to slowly melt away. Before we know it we will end up melting away all our glaciers, causing the sea levels around the world to rise.. Fir us in New Mexico, we don't have to necessarily worry about the sea level drastically affecting us, but for places like Louisiana, Hawaii, Cuba, Mexico and any other places near the sea, they will flood over and force the citizens to either migrate before the water hits, or die in the flood. Nevertheless, we must worry because it's crucial that we try to preserve the ozone sine it's our protector. If the ice melts, we won't have penguins or polar bears anymore, they'll drown and die away... Right now we're playing a chess game with ourselves that we're losing, we've eliminated some of our pawns, as well as a couple of crucial pieces, we're so close to being in check that it's become life or death, but if we think smarter and work greener, we can eliminate our enemy and equalize the playing field. At Menaul, we can begin to learn better recycling habits, we can save energy by using lights in the buildings when we need them, we can turn off electical devices and unplug cords when we finish using them, and most importantly, we can begin to raise more awareness around our community. My carbon footprint is 25 tons of CO2 a year, it's surprising to see how much of a footprint I leave on this earth but I believe that if I attempt to change how much energy I use at home I can attempt to lessen my footprint on this earth. 
Climate change is affecting our ecosystem is ways both immediate and prolonged, such as the melting of glaciers and the higher occurrence of natural disasters. Climate change also has an effect on the human population as well. It can cause phenomena such as poor planting seasons, floods, and decreased water sources. 
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Earth is composed of 360 quintillion gallons of water, but only 0.007% of it is potable. Seven billion people live on Earth, and 1.2 billion do not have access to clean water. A hamburger requires 2,700 gallons of water to make, probably taking into account all of the water used to process one from its roots. The citizens of the United States consume the most water per capita than any other country in the world.
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Texas has filed a lawsuit against New Mexico because it believes that New Mexico's use of more groundwater results in less water being distributed to Texas. Even though this may not be correct under the agreements involved, I think this case is justifiable because water is a very important resource that causes quite a bit of damage to an economy lacking it.
This case tells us that even in our country, we have problems getting water effectively distributed everywhere. It tells us that we should be more efficient with our water so that shortages would not be so costly. As this case exemplifies, conflict can ignite as a result of water resources, especially during seasons of drought. Under the perfect system, however, these conflicts would have a lesser chance of occurring.