Physics laws don't change over night, nor do they in 200 years.
You are correct, this is ROFL.. Physics laws do not change but our abilities to harness and utilize them for our own benefit does. Sometimes this can be overnight, sometimes it takes 200 years.
So what if in 50 years, we find a way to take the Co2 from the atmosphere, separate the carbon and manufacture fibers from it that replace steel in automobiles and bridges and other uses we now spend a lot of carbon energy on. What if in 100 years, we become more efficient and are able to do this with methane too?
This is the problem with the global warming crowd. Instead of finding solutions, they want to claim oppression of people via taxes the will severely strain their ability to enjoy lifestyles as they already know it and disrupt business while forcing their own agenda onto everyone is the only way. The fact is, there are several ways global warming can be addressed and these ways will be added to in the future as out knowledge increases. If the governments of the world were actually worried about global warming, they would be creating research teams devoted to finding solutions like efficient, reliable, and cost effective energy sources as well as ways to make use of emissions in a productive way and then make this knowledge available to the world so that it can be implemented. But instead, it's about restricting growth in first world nations while forcing investments into third world nations, it's about power and control of the populous.