Yesterday,we didn't have cars.But today we have.Yesterday,we didn't have TV sets.But today we have.Yesterday we didn't have computers.But today we have.During the hundreds of years,how fast the world has changed!That's really a myth.
Though the new world brings 北京癫痫病能否医好us a convenient life.It also brings more problems.For example,population,resources ,environment and so on.
We know that the world's population is growing faster and faster. It's more than 6 billion now.It's a very big number.We can say the number of world's populatio长春治癫痫病医院哪家比较好n is like the number of the stars in the universe.And if it goes on like that,I can't image what will happen.
As the second problem,the world is short of resources now.In daily life,we need water,rock oil,coal and other things.Day after day,the resources disappear fa郑州哪家医院能把癫痫病治好st.And they won't appear.Because most of them are not renewable resources.
The third problem is environment.Everyone talks about it.The weather is hotter and hotter .That means we pollute the environment seriously.Our cars make the air dirty.Old batteries make the so南昌癫痫病哪个医院治得好il poisonous.Waste water makes clean water dirty.So we don't have fresh air,fecund soil and pure water.Oh,no.Stop polluting!
Now we human beings should face the new challenge .We must think more about our mother earth.Remember:We don't have another earth!