Environmental awareness is increasing each year and this is a very optimistic trend. We have begun to realise that our planet's resources are not infinite, and if we do not act responsibly, our children and grandchildren will face an ecological disaster. For this reason, it is important to inform people today about the basic principles of environmental protection, and to search for alternative energy sources. What are the most popular renewable energy sources today and why should the whole world invest in them?

Recently, there has been more and more discussion about environmental protection and new energy sources. This is due to the growing environmental awareness in our society. People are beginning to realize that the natural resources of our planet are not infinite.

In the times when the Internet is an integral part of most people’s life, social networking sites are highly popular. The most successful of them is Facebook, which connects people from all over the world, and its users can be divided into three most characteristic categories, depending on what they publish on the site.