Quick on the draw!

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J J M K H A Q M E K Q U X G M V K S S M A
G J X L U R T H L B T M J T C H L E K F D
E F U L U W I P E L R I T T V G S N B Q D
O E K R Q P A K C Y O O W S T M G C B F O
Q U P R X F Y I T B K H T P U D J J I T V
W R H H T L L M R E X A G D P V G C O X M
W Q S Q Q U W Q O E E I B G D O L W F M P
E I R H D I Y H C F J K I H C F G A U G A
O W V L F N V N H S U W O Y D L M T E B P
R C M K T T T T E R Q N E C N O P E L V U
Y V K N V C Q K M S U R T J E Q O R S E D
V T X I B J R Q I O P N H K F A M Y T S K
Y N L M S A Y G C B X U A F V T C M V E P
X P Y X W F F L A H G E N L H F C T P E I
V M N I J K T U L S C V O Y C U Q O G S V
R I E K N R O P C P F R L Q G D L Q A F B
D M I E N V G F E Y A P K E D Q M I O H L
L E D I L K T E L R F P U B P O A N J D I
O O O S G B J Q L O J Y Y H B W X D A M U
G Q L F P Q O U T U K Q B M E O H E Q E P
H W I D K V V X M P S Q P V L F F V P V M

Clues

  • What is the only by-product of a hydrogen fuel cell? (5)
  • What name do we give to any fuels made from plants and animal waste? (8)
  • What type of biofuel is used mainly in Brazil and the USA? (10)
  • Which cell uses chemical reactions to produce electricity? (15, 4)

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