1.
Release carbon dioxide when burnt (examples include coal and oil).
2.
Material containing carbon that releases carbon dioxide when manufactured.
3.
Greenhouse gas produced by livestock and rice paddies.
4.
Process where trees are cut down, limiting the amount of carbon dioxide being removed from the atmosphere.
5.
Person who devised theory on orbital changes.
6.
The term for Earth's oval-shaped orbit.
7.
One of the three orbital changes alongside stretch and tilt.
8.
Landform whose eruptions can warm or cool the Earth.
9.
Cooled the Earth by 0.5°C when it erupted in 1991.
10.
Feature on the Sun which helps measure solar output.
