Chapter 4 what are some of the ways in which progress has been achieved in the future world Air and the earth have been purified

fruits, flowers and butterflies are everywhere

The ideal of preventine medicine has been attained.

Diseases have been stamped out.

only A and B

All of the above.​

When i was four years old, my dad and i a tree in our front yard. it was a tiny, fragile sapling. he promised me that it would grow tall and strong, but he said that i had to be patient. until i turned 18 years old, dad and i it every year on my birthday. choose the words that correctly fill in the blanks.