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The accurate term for this phenomenon is acid precipitation,as it does not only occur with rain. When saying acid rain, we generally refer to the deposition of acidic components in rain, snow, fog, dew, even to dry particles. The rain is always a bit acid, due to the excistence of carbon dioxide in the earth's atmosphere. When it exists in small quantities, it reacts with water to produce carbonic acid, which is weak and harmless. So, clean or unpolluted rain has a slightly acidic pH of 5.6 (having grade 7 as neutral) However, this is not the case when we talk about acid rain. Human activities have increased carbon dioxide and other greenhouse gases (term for gases that cause the greenhouse effect) primarily sulfur oxides and nitrogen oxides. Those,with water in the air,react to form strong acids (sulfuric and nitric acids) which are not at all harmless. On the contrary they are the ones to be blamed for every catastrophe acid rain cause. But how can we stop this phenomenon? The human activities mentioned before do not only include the large industries and factories, but each and every citizen. Wanting to stop acid rain and all its concequences,people have to reduce their carbon dioxide and other emissions. From the most important ones, like stop using cars, to the slightly blamed, like stop covering walls with graffities, we know what to do and we have to do it now. Image credit: Cm195902. Image licensed under a Creative-Commons Attribution-Share Alike license.

Almost all of human activities are connected with the environmental destruction. Food consumption is one of the most major factors and surprisingly, it mostly affects the sea and marine life. Fish is proved to be a healthy meal which provides humans with considerable needed substances and nutritions. This,along with many other reasons,have led to the mass consumption of most kinds of marine life worldwide. Even species we don't consume are in danger, mainly due to the methods used to fish the others. Bottom trawling is the recent most destructive way of catching fish. All fish not wanted are thrown dead back into the sea. Not to mention the complete destruction of coral reefs and sea bed. All these happen because the world market, and thus consumers, demand fish on almost daily basis. We must all act if we want to save marine life before it is too late. Since fish is vital for us and we cannot possibly stop eating it, we must choose the species less overfished and reduce the frequency of eating them to once a week (doctors say we don't need more anyway). So we can't eat, for example, bluefin tuna every night. We shouldn't be thinking that others don't follow our example and thus we don't make a difference. More and more people get to understand the problem and change their habits. Even if we don't know any of them,we must make our effort and stick to it. Image credit: Patotenere. Image licensed under a Creative-Commons Attribution license.