Larger ecosystem may be prone to sudden collapses once they have been pushed past a tipping point.
Termites can be important for ecosystems in semi-arid lands like grasslands and savannahs.
Tropical forests are losing their ability to absorb CO2 from manmade greenhouse gas emissions faster than expected.
What if you asked 20 million people about action on climate change? The UNDP has done just that.
Poor air quality varies by region, but some causes are climate-related beyond industrial or transport-linked emissions.
In just a few months some 5.8 million hectares of broadleaf forest burned down in New South Wales and Victoria.