Before I begin to deal with this topic in detail, I´d like to say that I have divided this topic into two important parts. First, I´m going to talk about the most important environmental problems nowadays, especially Climate Change. And then I´ll continue speaking about the different measures we can adopt to prevent this problem. To start with, I´d like to say that nowadays a variety of environmental problems affect our world such as global warming, pollution or climate change. But what is climate change? It may be defined as a fact, due to the increase of the greenhouse effect. This effect makes life on the earth possible, because it regulates the temperature. So if the greenhouse effect hadn´t existed, the temperature would had been too low for living beings and the ozone layer would be more and more destroyed. The main problem starts when human activities increase the levels of carbon dioxide. For example this gas is emitted by cars, planes, heating and so on. So the more greenhouse gases the atmosphere has, the warmer the temperature will be. Following this, and as you know, Climate Change is causing some effects on the environment, first of all, glaciers are melting, sea levels are rising and a lot of animals and plants are disappearing. Furthermore, the weather is more extreme. For example hurricanes, tornados and earthquakes, and storms are more frequent in some areas, even more acid rain and floods, while heatwaves and droughts are devasting others. On the other hand, I´d like to say that unless we take measures to deal with this problem quickly, we will suffer terrible consequences. For this reason I´d like to give some measures and advices to reduce this problem. Every bit helps. And I think that the most important measure is to follow the 3Rs: Reduce, Reuse and Recycle. Reduce: consist of buying products with not too much packaging, using less our cars and more public transport or to practice carpooling. And, it´s