1. There are 3 types of pollutions: air, water and soil pollution. We should use public transportation more often, use electric vehicles more, etc... in order to reduce air pollution and water pollution can be stopped by do not throw your rubbish into the river, oceans, avoid using the toilet as a wastebasket,...

2. Vietnam and especially in mid-Vietnam, often have some disasters like tropical storms, flooding, drought, and resulted in some geological events like landslides...

3. There are 4 types of communications like verbal - use of language by speaking, nonverbal - body language, written - transfer information by writing and visual which is using arts, graphs to convey information. What we should do when communicating online is to use clear language, do not use shortcuts, respect others' opinions... We should avoid writing all capital letters because it looks like we are shouting at them.

4. Scientific researches have some benefits in our life like we know how to eat healthily or about the technologies we used like phones, computers or even the lights from the ceiling are invented by scientists which help our life a lot. Besides, we can work and study a lot easier with devices, too.