1		2		3
						4											5
								6
	7
	8															9
			10																11
										12
		13
14
15

Across 6. More intense heat will lead to an increase in the frequency and severity of these (6,5) 8. These allow for an exchange of gas between the biosphere and atmosphere (7) 10. Green organelles in plants (12) 12. Carbon locked up at the pole (10) 13. The conversion of stored chemical energy into thermal energy (10) 14. Bi-product of anaerobic respiration in animals (6,4) 15. Carbon rich fuels that powered the industrial revolution (6)

Down 1. The mass of living organisms in a given area at a specified time (7) 2. Nature solution to help lock away carbon (5) 3. Compression of sediment to form rocks (e.g Chalk) (13) 4. Carbon carried down into the depths of the earth (10) 5. A single celled fungus important in beer and bread (5) 7. Increasing CO2 will result in an increase in this (4) 9. A process - The endless fall of rain drops reduces mountains to sand (10) 10. Marine creatures with calcium carbonate bodies that fall to the seabed (10) 11. An increase in ocean temperature may feel lovely, but there won't be much colour to see on the reef!(9)