Bitcoin as a whole will do more to combat climate change than any and all government efforts for a couple of reasons.
1. Bitcoin fixes incentives that have been distorted by fiat money. When we work, we are exchanging our labor for something of value (money) but since fiat money can be printed out of nothing, the value of that labor is diluted and part of the value of our labor is transferred to whoever receives the newly printed money. This endless money printing leads to disproportionate consumption of natural resources. We simply cannot have an infinite money supply to measure the value of a finite earth.
We print money to pay for houses, college, cars, and credit cards to name a few. The entire fiat world is based on debt and borrowing tomorrow's earnings to consume more goods today. Such levels of spending and consumption are not possible on a Bitcoin standard.
Bitcoin brings balance back to consumerism by incentivizing us to save our money for the long term rather than short term consumption. We can buy less stuff on credit and need to save up to buy things.
2. Bitcoin mining helps to combat climate change by gravitating to parts of the world where there is a surplus of energy like stranded energy, curtailed energy, and other natural resources that are otherwise wasted. Where we are seeing this the most right now is oil well flaring, solar farms, wind farms, and even hydroelectric dams. Bitcoin mining will eventually be drawn to all of these sources because it will simply become too cost prohibitive to mine with standard grid electricity when surplus energy is being used that would otherwise go completely to waste (free energy). If ever these cheap energy sources are no longer able to produce a profit from bitcoin mining (any potential grid demand would pay more than the block reward), the miners will shut down and relocate to a part of the world with cheaper and more abundant energy. That frees up that energy source to be put to use doing something else like supplying the local energy grid with electricity.
Personally, I am most interested in micro hydro generation using small scale generation that doesn't require river dams (like this Belgian company is producing
https://www.turbulent.be/) and can be deployed all along the river to decentralize the mining as well as the energy production all along the river. Bitcoin mining could even pay to build out this infrastructure and once the energy producers could make more money selling to the local grid, the miners stop mining and the local community buys the electricity instead.
Not only will bitcoin bring balance back to consumerism but bitcoin mining will also incentivize and even subsidize the production of incredibly cheap and abundant energy.