The Earth's climate is naturally dynamic, and with quite extreme natural variations. The assumption that any climate change that is occurring or is assumed to be occurring now is solely due to Human activity is somewhat hubristic. Ultimately, Humans are unimportant little blobs of mostly carbon crawling around the planet's surface (no offence to those who have a belief in a chosen deity that they think says otherwise).
That said, Humans have been affecting the environment and hence the climate for probably our entire existence. I believe the current explanation for the formation of the Sahara desert is natural (wobble of the Earth or some such about 6000 years ago), but that local grazing practices have contributed towards it's expansion (and that was long before industrialisation and the widespread use of fossil fuels).
Humans created the dust bowl in the US in the 1930's, and the Soviet's were responsible for the drying up of the Aral Sea.
It is recognised that building large dams affects the environment/micro-climate of the area they are built in.
In inventing agriculture, we, as a species, have completely changed much of the planet's landscape, with corresponding changes to moisture (evaporation) and drainage patterns, etc. In domesticating various plant and animal species we have also, through selective breeding, been undertaking genetic engineering for several thousand years, creating whole new breeds, and eliminating natural traits from various species.
The entire UK landscape of Green and Pleasant Land that we now tend to look on as something to be protected because it's 'nature' is in practice a human created environment, resulting from large scale deforestation.
There are a number of good reasons to reduce our use of 'fossil fuels', and one of them may be that their use causes climate change and that climate change is a bad thing and has to be stopped. But I note that quite recently, the BBC deleted from their website on climate change a section on 'benefits of climate change', under pressure from a self-selected band of 'climate defenders' (who, I suspect, are often motivated more by baser politics than true concern for the environment).
It should be of great concern to anyone that believes in evidence-based decision making, who considers facts and reason to be the foundation of discussion and identification of technical solutions, that contrary opinions have to be silenced, contrary evidence has to be suppressed.
Humans have, throughout our existence, modified environment (and climate), sometimes accidentally/ignorantly/stupidly, often times deliberately, intelligently, and for our benefit.
The current 'climate emergency' has been too heavily politicised and monetarised. Sadly, it makes any debate as to what is actually the best course of action impossible, too many people have views that are too entrenched / self serving.