very toxic
2.Imagine having a very strong glue that is non-toxic and so flexible that it can penetrate the tiniest holes and corners, sticking to any surface, even under water.
4.In process of transporting and storing of petroleum, as the petroleum itself is flammable ,explosive and toxic, once it is on fire ,the accident of explodes or leakage take place, that will produce very great pollution to the environment ,and will cause the enormous economic losses to be even great casualties, so it is very important to ensure the petroleum to be transported and stored safely in the course.
