Evidence that our planet is teetering on the edge of disaster is everywhere to be seen.
Bolsonaro and Macron have repeatedly locked horns in the past week over the fires ravaging the Amazon basin, one of the main topics at the G7 summit the French president is hosting in Biarritz.
The US said it would not join with the other six countries in reaffirming their commitments to Paris climate accord. The G7 communique, however, described the climate pact as "irreversible".
The environment ministers will meet in Bologna on Sunday and Monday to discuss climate change, sustainable development and litter at sea.
There is a scientific consensus that climate change is happening. A rise in global temperatures is a documented fact - the world has already warmed about 1.1 degrees Celsius since the Industrial Revolution.
During his 2016 presidential campaign, Trump blasted the Paris accord, and called global warming a hoax aimed at weakening US industry. Pulling the US from the accord could further alienate American allies in Europe.
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