Yes, there are, but the only new process on Earth that has been identified that can account for the significant tipping of Earth's carbon balance is human activity, including deforestation, biomass burning, cement production, and—especially—fossil-fuel emissions.
If you missed our August 29 tweet chat, here's the transcript. Read what the fire and smoke experts had to say about the FIREX-AQ field campaign and its mission to study what's in the smoke from wildfires and agricultural burning.
Across much of the mid-latitudes, models estimate that the converting forests to farms and rangeland shortened the return period for extremely hot, dry summers: from every 10 years to every 2-3 years.
Trees within a city can help reduce urban heat, control stormwater, and provide habitat to local wildlife. As climate conditions change, a Chicago group is working to enhance the reilience of the city's urban forest.
Climate connections to Fort McMurray fire
May 12, 2016
How drought affects carbon balance in the Amazon
March 6, 2014