Earth hour can have a significant impact on our planet. Because much can be achieved when people work together towards a shared goal.
I’ve posted about because before – here, here, and here. It’s such a common word and so you should make a special effort to use it correctly. Incorrect use can have a negative effect on your IELTS speaking and writing scores!
Basically, if you want to communicate cause and effect using because, you have 2 options.
Notice that in each case the effect is described using an independent clause: Earth hour can have a significant impact on our planet.
Here you need to be careful. Because of is followed by a noun phrase (not an independent clause). However, because of behaves much like because in terms of sentence structure:
If you find that you sometimes use because inaccurately, add a comment below explaining why you think you make the error. And don’t forget to use because!