-- card: 17817 from stack: in.11
-- bmap block id: 0
-- flags: 0000
-- background id: 17587
-- name: 


-- part 1 (button)
-- low flags: 00
-- high flags: 0000
-- rect: left=444 top=22 right=57 bottom=475
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
  visual effect wipe right
  go to next card
end mouseUp



-- part 2 (button)
-- low flags: 00
-- high flags: 0000
-- rect: left=411 top=21 right=59 bottom=443
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: New Button
----- HyperTalk script -----
on mouseUp
  visual effect wipe left
  go to previous card
end mouseUp



-- part 3 (button)
-- low flags: 00
-- high flags: A003
-- rect: left=362 top=30 right=48 bottom=407
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Print
----- HyperTalk script -----
on mouseUp
  doMenu "Print Card"
end mouseUp



-- part contents for background part 1
----- text -----
Culprit: CO2 From Fossil Fuel Use

-- part contents for background part 2
----- text -----
2. Modern CO2 Measurements

-- part contents for background part 6
----- text -----
  In 1958 Charles Keeling, of the Scripps Institute of Oceanography, began to measure carbon dioxide levels in the atmosphere.  The site selected for these measurements was on top of the volcanic mountain of Mauna Loa, in Hawaii.  No vegetation grows on the rocky slopes, and this is important because the photosynthesis and respiration of plants in the area could upset the CO2 measurements. 
  CO2 measurements at the Hawaiian site have continued.  The instruments show the level of CO2 has been steadily increasing (about 0.4% per year) from a level of 315 parts per million in 1958 to 353 ppm in 1990.   Clearly, Earth's natural mechanisms for absorbing CO2 from the atmosphere cannot handle the large quantities of CO2 being added by modern man.  Scientists believe nearly   1/2 of the CO2 being emitted each year remains in the atmosphere, while the rest is being absorbed by trees and the oceans.  As a result, CO2 measurements show a continuing build- up of CO2 greenhouse gases in the air - gases that will eventually lead to more global heating. ***