Our environment has changed because humans destroy it. They inadvertently destroyed, and they don't know who will maintain it. We have created a three-r is designed to protect the environment.
Our environment has changed because it destroys human beings. They destroyed unawares, and they did not know where to keep it, so we built three Rs to protect the environment.
Our environment is changing because humans destroy it. They destroy unconsciously and they don"t know to keep it, so we created a สามอาร์ up to protect the environment.