The green movement has come a long way since it began several decades ago. Multitudes of companies and individuals are now taking every possible measure to green their homes and buildings. Regardless whether you are a seasoned green activist or a novice just catching green fever, take our quiz now to test how green you can be.
How much do you know about how car engines work? And how much do you know about how the English language works? And what about how guns work? How much do you know? Lucky for you, HowStuffWorks is about more than providing great answers about how the world works. We are also here to bring joy to your day with fun quizzes, compelling photography and fascinating listicles. Some of our content is about how stuff works. Some is about how much you know about how stuff works. And some is just for fun! Because, well, did you know that having fun is an important part of how your brain works? Well, it is! So keep reading!