Yeah but emissions are only one part of the equation - logging a forest will produce more net atmospheric carbon than taking a long-haul plane trip, even though cutting down trees doesn't emit anything.

The biggest carbon sink is the ocean, so doing things that damage the ocean (like dumping trash into a river) are more of a concern.

There's also other environmental concerns than CO2 and climate change. Damaging jungle and ocean ecosystems creates other effects that we need to be concerned about (not least biodiversity losses from loss of habitat and population).