Throughout history, human beings have constantly changed the natural environment to improve their way of life. With the help of technical tools, human beings have changed many natural features of the earth. He turned woodland and grassland into farmland and rivers into lakes and reservoirs for irrigation or hydropower generation. Humans have also changed the face of the earth by draining swamps, chiseling rocks and splitting mountains, and building roads and railways. However, human beings' changing the natural environment does not always bring beneficial results. Today, air and water pollution are causing more and more serious harm to the health of the earth. Thousands of tons of exhaust gas are discharged from the exhaust pipe of motor vehicles every day. Smoke from factories pollutes the air in industrial areas and surrounding villages. Water pollution is also harmful, the whole ecological balance of the ocean is being destroyed, and industrial wastewater has killed many rivers. Now, environmental protection is more urgent than ever. We know that large-scale destruction of the environment has brought negative effects and even seriously threatened the survival of mankind. Indifference to these problems will mean self-destruction. Therefore, effective measures should be taken and laws passed to protect the environment. Otherwise, human beings will inevitably suffer serious consequences because they don't care about the living environment.
There are also some reference sentences
With the improvement of living standards, more and more people pay more attention to health.
With the improvement of people's living standards, more and more people begin to pay attention to their health.
Keeping a clean environment contributes to people's health. But many people haven't realized this yet.
A clean environment is very helpful for people to keep healthy, however, this is not realized by everyone.
Unsanitary phenomena such as littering are still common.
Bad behaviors such as throwing rabbits everywhere are still common.
I think we should take measures to make people realize the importance of keeping the environment clean.
In my opinion, we should take measures to make people realize the importance of cleaning the environment.