Yes, Virginia, I have been looking for many years into environmental problems and their causes.
And ecological problems due to human "activities" are not so recent as many think, but there were and are also other than human interferences.
Climate changes occurred during earth history, long before the human species was "born":
https://en.wikipedia.org/wiki/Climate_change
https://en.wikipedia.org/wiki/Natural_disaster
And smaller climate variations followed during human history, for instance
https://en.wikipedia.org/wiki/Medieval_Warm_Period
But the list of environmental issues is very long, and the human presence on earth caused significant impacts:
https://en.wikipedia.org/wiki/List_of_environmental_issues
These are just a few of the main causes for a climatic change, which can be caused by human and non-human interferences (check references and links):
https://en.wikipedia.org/wiki/Erosion
https://en.wikipedia.org/wiki/Desertification
https://en.wikipedia.org/wiki/Deforestation
https://en.wikipedia.org/wiki/Pollution
https://en.wikipedia.org/wiki/Overexploitation
https://en.wikipedia.org/wiki/Environmental_impact_of_irrigation
https://en.wikipedia.org/wiki/Environmental_impact_of_war
https://en.wikipedia.org/wiki/Human_overpopulation
https://en.wikipedia.org/wiki/Urban_sprawl
https://en.wikipedia.org/wiki/Litter
https://en.wikipedia.org/wiki/Waste
https://en.wikipedia.org/wiki/Intensive_farming
https://en.wikipedia.org/wiki/Water_security
https://en.wikipedia.org/wiki/River_engineering
https://en.wikipedia.org/wiki/Great_Pacific_garbage_patch
https://en.wikipedia.org/wiki/Aridification
https://en.wikipedia.org/wiki/Soil_retrogression_and_degradation
https://en.wikipedia.org/wiki/Ecological_collapse
https://en.wikipedia.org/wiki/Carrying_capacity
Useful tools to assess the ecological impacts of single products, services, activities, etc. are the so called "life cycle assessments", involving every step, action, interaction, "footprint", circumstances, etc., from the cradle to the grave.
https://en.wikipedia.org/wiki/Life-cycle_assessment
And we know that since long, the human impact is one of the main causes of environmental depletion, because certain changes are much too fast to be caused alone by natural processes.
Additionally, most ruling and warfaring clans, monarchs, ministers, big bosses or "religious" leaders did/do not really care for the welfare of their own people - in the past and in present times ... Humans are too often the worst ennemy of their own species - at all the levels.
With the present propaganda, hate, threatening, shaming and insulting campaigns, most people don't know whom they can trust, as radicalism, fascism, sexism and perversion are on the rise.