Year
Blwyddyn
To rise
Codi
To warm
Cynhesu
Global warming
Cynhesu byd-eang
Coal
Glow
Ozone layer
Haen oson
Climate
Hinsawdd
To burn
Llosgi
Pollution
Llygredd
Gas
Nwy
Oil
Olew
Ice
Rhew
To melt
Toddi
Hole
Twll
To grow
Tyfu
Long term
Tymor hir
Air/sky
Awyr