/challenges-projects/design-challenges/sustain-the-world-design-challenge/b/blog/posts/and-i-keep-working-on-the-application-blog-10Although we are already at Zero hour. I still have to add the application of "extracting toxic gases from the environment".I already have the idea of how it goes. And it will be with the MQ135 sensor where I got better results in practice. (detects ien-USTelligent Community 12