I am certain man has destroyed animal and plant life on a massive scale, stripped forests, paved over, burnt, polluted, and turned oceans, seas, lakes, rivers into toxic effluence, contaminated the air to the point of unsustainability.
I cannot deny that all this global damage is connected and has been responsible for the obvious changes in climate. As long as the current human population increases or levels off we can only expect a continuing depletion of natural elements and increase in the toxicity and disruption on Earth.
To ignore or deny the evidence so obvious all over the world is naive and its own kind of arrogance.
To not apply at least "abundance of caution" efforts to retard or reverse the obvious downward trend in liveable conditions is irresponsible and bound to have disastrous consequences.