1 Water pollution is one of the most important problems. The main cause is acting of people. People usually throw rubbish and discharging chemical to the lakes and rivers   And it effects to human life . People will use water from the lakes and the rivers. They will have many matters with their health. To protect our life, you mustn't throw rubbish,  discharging chemical to the lakes and rivers and try propagandizing people to not do it. I think in the future people will  st to protect 

2 Mobile phone are a type of portable device which is used for communication. The usage of the mobile phone is increasing day by day since 2003. Mobile phone has many disadvantages. Firstly, Mobile Phones Cause Isolation.

Mostly the too much use of mobile phones causes isolation in the people.Secondly, 

Mobile Phone Wastage of Time. Mostly the teenagers and students get affected by this.

Finally,Mobile Phone Distraction, Also, mobile phones distract the students in study time. People should use mobile phone less, it also helps their health