I think misuse and overuse of science and technology is threating human society and this planet. Some of them are:
1. Global Warming, which is a side effect of new innovations.
2. Humanoids : Robots which will develop there own intelligence with time.
3. Internet : It will too add to a number of social problems, right now its just the beginning.
4. Processed foods.
5. Automated weapons.
6. Stress created by our new lifestyle, which is behind terrorism.