History: challenges of our world

challenges and hopes for the future

challenges of our world
challenges and hopes for the future

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ACIDRAIN
BIOETHICS
BIOWARFARE
DEFORESTATION
ECOLOGY
GREENHOUSE
OZONELAYER
RACHELCARSON
F W E H H J I P O F X M V L C
N D G R E E N H O U S E A F D
Z O E C O L O G Y O A H G N Y
X I S F V C E B K A D K Q F U
V A M R O Z O N E L A Y E R B
E N N B A R Q C A X J B C A C
D X K I I C E L E J C N V A K
W R H O A O L S P L F N K W O
A J S W B R E E T R N P F C O
Z B C A W U D T H A O G L J Q
T W L R M X I I H C T K L H Q
V P E F P H N Y C I A I U R V
E K D A M Z T C O A C R O K D
P O O R N Z T B N T Y S J N B
A X Q E M D L N H X G G H A S
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