Quick on the draw!

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

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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