During my time at university one of the units I studied that I found was of most ‘practical’ value was “The History of Climate Change”. When I say practical value, I mean it taught me things that are and will be hugely beneficial to my understanding of the climate. One of the things I learnt about was the ozone layer and how human activities have contributed to ozone depletion. The ozone layer surrounds the Earth and is made up of molecules of O3. O3 molecules are not as stable as the O2 we breathe. This means O3 is highly reactive with other molecules such as halogens. How do halogens reach the ozone layer? During the 1980s CFCs (found in fridges and degreasing solvents) were the main cause and contributed significantly to ozone depletion. But why should we worry about ozone depletion?
Our bodies would not be able to function properly without bacteria. They are found throughout our bodies and aid in many processes such as digestion. The human digestive tract is littered with 000’s of so called ‘friendly-bacteria’. These friendly bacteria help digest food and ensure harmful bacteria do not build up. If the harmful bacteria … Read more What will your life be like without antibiotics?
The climate we live in today is one of change. There is a huge debate as to if that change is for the better or worse, but the fact remains the climate is changing. This is not a new phenomenon. The climate has radically changed since the beginning of life some 3.6-3.8 billion years ago. However, no single species has ever been directly responsible for changing the climate – until Homo sapiens rocked up. We are changing the climate so quickly evolution can’t keep up. This means many species are struggling to survive, leading to a significant number of species extinctions. We are very quick to jump to the needs of endangered species, particularly those that are beneficial to us. But what about the species we don’t like? What about mosquitos? How many times have you been on holiday and got a nasty bite, or been forced to religiously take anti-malaria tablets? Mosquitos are irritating disease spreaders, so why don’t we just get rid of them?