My god, you don’t even know what mitigation is. Mitigation is not decarbonisation (“reduction of emissions”), you plonker. Mitigation is reduction of the negative impacts of climate change, like sea and flood defences, etc. And as it happens, we are decarbonising a lot, it’s just there’s a lot more to do.
Globally, we spend $1.5 trillion dollars a year on fossil fuel extraction, ie on drilling, mines, wells, production platforms, equipment, labour, maintenance and the energy to operate them, but not including the fuels themselves. We’ve been spending at this level for literally 80 or more years, and most of that investment is now pointless because wells and fields run dry. By comparison, we still only spend $0.85 trillion a year on renewables today, and have only spent at this kind of level for about 5 years, and already we are at the point where that’s providing something like 20 to 25% of global useful energy, and those assets will continue to be useful for decades without depleting and without requiring large opex because there’s no fuel to extract, transport and combust. In other words, each dollar invested in building renewable capacity can displace future fuel extraction costs for decades.