A Bigger contributor to GW than Carbon Dioxide.
Check out this, the scientific papers back it up as localised climate change only though.
Biodiversity is another problem, which most people know about anyway. Check out Koalas since they have a special relationship with certain eucalyptus trees. Deforestation will affect Australia badly where we'll have a thriving population of koalas one minute, then extinction the next if we follow our usual path.