The quality of human life has improved greatly over the past few centuries, but Earth is being ' }: S! R9 Z- i' g1 P# X# i F
harmed more and more by human activity. As we develop our technology, we demand more from our planet. Eventually, this will harm people as well. : Q( Q2 u) m8 g# c( E) j
Our planet gives us everything we need, but natural resources are not endless. Strip mining , J( z) r0 T8 L. T# Z) o, \6 ]8 z
devastates whole regions, leaving bare and useless ground. Deforestation removes old growth
/ @2 L$ \4 X! v ]1 Z* ttrees that can’t be replaced. Too much fishing may harm fish populations to the point where they
5 Y/ O$ j7 L9 I3 [8 fThe quality of human life has improved greatly over the past few centuries, but Earth is being 5 N G5 S) h( _1 ]+ i$ B: G
harmed more and more by human activity. As we develop our technology, we demand more from our planet. Eventually, this will harm people as well.
: o4 E( p( a& y2 xOur planet gives us everything we need, but natural resources are not endless. Strip mining 8 a, s; H" z0 e, Q# z9 Z' J7 ^8 o
devastates whole regions, leaving bare and useless ground. Deforestation removes old growth % f2 U0 G* v& z( ]3 x/ C4 V. N
trees that can’t be replaced. Too much fishing may harm fish populations to the point where they |
发表于 2012-8-14 23:46:10
