Sustainable development is what our world desperately needs in order to keep our planet clean. As you have already understood, old ways of getting energy no longer work since we have caused too much damage. That is the reason why it is so important to make sure that we use alternative sources of energy.
What is more, one should not forget that there are lots of different ways in which we can help the planet. The easiest one is to start recycling. We do not need to cut off more trees when we can easily recycle old paper and make something out of it.
There are great examples in the world regarding the ways in which we can improve the way in which we treat our planet. What is important here is to make sure that every country is doing the same as unity is the only way in which we can achieve success and tackle the issue of global warming. What is also significant is to start doing that right away.