As a species, will homo sapien leave a constructive or a destructive legacy.?

Destructive, no doubt. Look at the mess we have made already!

Without a doubt Constructive!! If you speculate on what kind of legacy we will leave; one must conclude that with the way the present system is moving toward we will be ever more conscious about our environment and continue to make changes to improve where we messed up. Today we are talking about non-reliance on fossil fuels, tomorrow we will find the solution to not rely on fossil fuels.

mostly destructive, but people like steve irwin and jane goodall made differences.

In terms of life on this planet, we are pretty destructive and sel centered, just like all organisims. I think we are going to find out if we are an R adaptive species or a K adaptive species very, very soon. BTW isn't it exciting to be living during the biggest and fastest mass extinction event in the planet's history! We're MUCH bigger than the Cretaeceous M.E.E.!!! Cool, isn't it!!

Constructive in terms of getting civilized, culture, technology, inventions. But destructive in the way we exploit the planet and damage the eco - system. Remember, no other species had done or doing that at this rate.

who know and who cares will all be dead and there will be nothing left to judge us, so our legacy will be nothing old weathered buildings that maybe some extra terrestrial civ might find and study but game over we lost